@inproceedings{DBLP:conf/ranlp/NgomoMB19,

title = {A Holistic Natural Language Generation Framework for the Semantic 

Web},

author = {Axel-Cyrille Ngonga Ngomo and 

Diego Moussallem and 

Lorenz Bühmann},

url = {https://doi.org/10.26615/978-954-452-056-4_095},

doi = {10.26615/978-954-452-056-4_095},

year  = {2019},

date = {2019-01-01},

booktitle = {Proceedings of the International Conference on Recent Advances in 

Natural Language Processing, RANLP 2019, Varna, Bulgaria, September 

2-4, 2019},

pages = {819--828},

publisher = {INCOMA Ltd.},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/www/BuhmannLWB18,

title = {DL-Learner Structured Machine Learning on Semantic Web Data},

author = {Lorenz Bühmann and 

Jens Lehmann and 

Patrick Westphal and 

Simon Bin},

url = {https://doi.org/10.1145/3184558.3186235},

doi = {10.1145/3184558.3186235},

year  = {2018},

date = {2018-01-01},

booktitle = {Companion of the The Web Conference 2018 on The Web Conference 2018, 

WWW 2018, Lyon , France, April 23-27, 2018},

pages = {467--471},

publisher = {ACM},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/ErmilovLSBWSBCP17,

title = {The Tale of Sansa Spark},

author = {Ivan Ermilov and 

Jens Lehmann and 

Gezim Sejdiu and 

Lorenz Bühmann and 

Patrick Westphal and 

Claus Stadler and 

Simon Bin and 

Nilesh Chakraborty and 

Henning Petzka and 

Muhammad Saleem and 

Axel-Cyrille Ngonga Ngomo and 

Hajira Jabeen},

url = {http://ceur-ws.org/Vol-1963/paper552.pdf},

year  = {2017},

date = {2017-01-01},

booktitle = {Proceedings of the ISWC 2017 Posters & Demonstrations and Industry 

Tracks co-located with 16th International Semantic Web Conference 

(ISWC 2017), Vienna, Austria, October 23rd - to - 25th, 2017},

volume = {1963},

publisher = {CEUR-WS.org},

series = {CEUR Workshop Proceedings},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/LehmannSBWSEBCS17,

title = {Distributed Semantic Analytics Using the SANSA Stack},

author = {Jens Lehmann and 

Gezim Sejdiu and 

Lorenz Bühmann and 

Patrick Westphal and 

Claus Stadler and 

Ivan Ermilov and 

Simon Bin and 

Nilesh Chakraborty and 

Muhammad Saleem and 

Axel-Cyrille Ngonga Ngomo and 

Hajira Jabeen},

url = {https://doi.org/10.1007/978-3-319-68204-4_15},

doi = {10.1007/978-3-319-68204-4_15},

year  = {2017},

date = {2017-01-01},

booktitle = {The Semantic Web - ISWC 2017 - 16th International Semantic Web Conference, 

Vienna, Austria, October 21-25, 2017, Proceedings, Part II},

volume = {10588},

pages = {147--155},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

abstract = {Over the past decade, vast amounts of machine-readable structured information have become available through the automation of research processes as well as the increasing popularity of knowledge graphs and semantic technologies. A major research challenge today is to perform scalable analysis of large-scale knowledge graphs to facilitate applications like link prediction, knowledge base completion and question answering. Most analytics approaches, which scale horizontally (i.e., can be executed in a distributed environment) work on simple feature-vector-based input rather than more expressive knowledge structures. On the other hand, analytics methods which exploit expressive structures usually do not scale well to very large knowledge bases. This software framework paper describes the ongoing project Semantic Analytics Stack (SANSA) which supports expressive and scalable semantic analytics by providing functionality for distributed in-memory computing for RDF data. The library provides APIs for RDF storage, querying using SPARQL and forward chaining inference. It includes several machine learning algorithms for RDF knowledge graphs. The article describes the vision, architecture and use cases of SANSA.},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/ecai/BinBLN16,

title = {Towards SPARQL-Based Induction for Large-Scale RDF Data Sets},

author = {Simon Bin and 

Lorenz Bühmann and 

Jens Lehmann and 

Axel-Cyrille Ngonga Ngomo},

url = {https://doi.org/10.3233/978-1-61499-672-9-1551},

doi = {10.3233/978-1-61499-672-9-1551},

year  = {2016},

date = {2016-01-01},

booktitle = {ECAI 2016 - 22nd European Conference on Artificial Intelligence, 

29 August-2 September 2016, The Hague, The Netherlands - Including 

Prestigious Applications of Artificial Intelligence (PAIS 2016)},

volume = {285},

pages = {1551--1552},

publisher = {IOS Press},

series = {Frontiers in Artificial Intelligence and Applications},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/ekaw/0001FLB16,

title = {Integrating New Refinement Operators in Terminological Decision Trees 

Learning},

author = {Giuseppe Rizzo and 

Nicola Fanizzi and 

Jens Lehmann and 

Lorenz Bühmann},

url = {https://doi.org/10.1007/978-3-319-49004-5_33},

doi = {10.1007/978-3-319-49004-5_33},

year  = {2016},

date = {2016-01-01},

booktitle = {Knowledge Engineering and Knowledge Management - 20th International 

Conference, EKAW 2016, Bologna, Italy, November 19-23, 2016, Proceedings},

volume = {10024},

pages = {511--526},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/BuhmannUN15,

title = {ASSESS - Automatic Self-Assessment Using Linked Data},

author = {Lorenz Bühmann and 

Ricardo Usbeck and 

Axel-Cyrille Ngonga Ngomo},

url = {https://doi.org/10.1007/978-3-319-25010-6_5},

doi = {10.1007/978-3-319-25010-6_5},

year  = {2015},

date = {2015-01-01},

booktitle = {The Semantic Web - ISWC 2015 - 14th International Semantic Web Conference, 

Bethlehem, PA, USA, October 11-15, 2015, Proceedings, Part II},

volume = {9367},

pages = {76--89},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{HAWK_2015,

title = {HAWK - Hybrid Question Answering over Linked Data},

author = {Ricardo Usbeck and Axel-Cyrille Ngonga Ngomo and Lorenz Bühmann and Christina Unger},

url = {http://svn.aksw.org/papers/2015/ESWC_HAWK/public.pdf},

year  = {2015},

date = {2015-01-01},

booktitle = {12th Extended Semantic Web Conference, Portorov z, Slovenia, 31st May - 4th June 2015},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/esws/UsbeckNBU15,

title = {HAWK - Hybrid Question Answering Using Linked Data},

author = {Ricardo Usbeck and 

Axel-Cyrille Ngonga Ngomo and 

Lorenz Bühmann and 

Christina Unger},

url = {https://doi.org/10.1007/978-3-319-18818-8_22},

doi = {10.1007/978-3-319-18818-8_22},

year  = {2015},

date = {2015-01-01},

booktitle = {The Semantic Web. Latest Advances and New Domains - 12th European 

Semantic Web Conference, ESWC 2015, Portoroz, Slovenia, May 31 - 

June 4, 2015. Proceedings},

volume = {9088},

pages = {353--368},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/ekaw/BuhmannFLMV14,

title = {Inductive Lexical Learning of Class Expressions},

author = {Lorenz Bühmann and 

Daniel Fleischhacker and 

Jens Lehmann and 

André Melo and 

Johanna Völker},

url = {https://doi.org/10.1007/978-3-319-13704-9_4},

doi = {10.1007/978-3-319-13704-9_4},

year  = {2014},

date = {2014-01-01},

booktitle = {Knowledge Engineering and Knowledge Management - 19th International 

Conference, EKAW 2014, Linköping, Sweden, November 24-28, 

2014. Proceedings},

volume = {8876},

pages = {42--53},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/esws/RulaPNGLB14,

title = {Hybrid Acquisition of Temporal Scopes for RDF Data},

author = {Anisa Rula and 

Matteo Palmonari and 

Axel-Cyrille Ngonga Ngomo and 

Daniel Gerber and 

Jens Lehmann and 

Lorenz Bühmann},

url = {https://doi.org/10.1007/978-3-319-07443-6_33},

doi = {10.1007/978-3-319-07443-6_33},

year  = {2014},

date = {2014-01-01},

booktitle = {The Semantic Web: Trends and Challenges - 11th International Conference, 

ESWC 2014, Anissaras, Crete, Greece, May 25-29, 2014. Proceedings},

volume = {8465},

pages = {488--503},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/BuhmannUNSBCMQ14,

title = {Web-Scale Extension of RDF Knowledge Bases from Templated Websites},

author = {Lorenz Bühmann and 

Ricardo Usbeck and 

Axel-Cyrille Ngonga Ngomo and 

Muhammad Saleem and 

Andreas Both and 

Valter Crescenzi and 

Paolo Merialdo and 

Disheng Qiu},

url = {https://doi.org/10.1007/978-3-319-11964-9_5},

doi = {10.1007/978-3-319-11964-9_5},

year  = {2014},

date = {2014-01-01},

booktitle = {The Semantic Web - ISWC 2014 - 13th International Semantic Web Conference, 

Riva del Garda, Italy, October 19-23, 2014. Proceedings, Part I},

volume = {8796},

pages = {66--81},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/i-semantics/ZaveriKSBMAL13,

title = {User-driven quality evaluation of DBpedia},

author = {Amrapali Zaveri and 

Dimitris Kontokostas and 

Mohamed Ahmed Sherif and 

Lorenz Bühmann and 

Mohamed Morsey and 

Sören Auer and 

Jens Lehmann},

url = {https://doi.org/10.1145/2506182.2506195},

doi = {10.1145/2506182.2506195},

year  = {2013},

date = {2013-01-01},

booktitle = {I-SEMANTICS 2013 - 9th International Conference on Semantic Systems, 

I-SEMANTICS '13, Graz, Austria, September 4-6, 2013},

pages = {97--104},

publisher = {ACM},

abstract = {Linked Open Data (LOD) comprises of an unprecedented volume of structured datasets on the Web. However, these datasets are of varying quality ranging from extensively curated datasets to crowdsourced and even extracted data of relatively low quality. We present a methodology for assessing the quality of linked data resources, which comprises of a manual and a semi-automatic process. The first phase includes the detection of common quality problems and their representation in a quality problem taxonomy. In the manual process, the second phase comprises of the evaluation of a large number of individual resources, according to the quality problem taxonomy via crowdsourcing. This process is accompanied by a tool wherein a user assesses an individual resource and evaluates each fact for correctness. The semi-automatic process involves the generation and verification of schema axioms. We report the results obtained by applying this methodology to DBpedia. We identified 17 data quality problem types and 58 users assessed a total of 521 resources. Overall, 11.93% of the evaluated DBpedia triples were identified to have some quality issues. Applying the semi-automatic component yielded a total of 222,982 triples that have a high probability to be incorrect. In particular, we found that problems such as object values being incorrectly extracted, irrelevant extraction of information and broken links were the most recurring quality problems. With this study, we not only aim to assess the quality of this sample of DBpedia resources but also adopt an agile methodology to improve the quality in future versions by regularly providing feedback to the DBpedia maintainers.},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/kesw/HoffnerUBLNGC13,

title = {User Interface for a Template Based Question Answering System},

author = {Konrad Höffner and 

Christina Unger and 

Lorenz Bühmann and 

Jens Lehmann and 

Axel-Cyrille Ngonga Ngomo and 

Daniel Gerber and 

Philipp Cimiano},

url = {https://doi.org/10.1007/978-3-642-41360-5_21},

doi = {10.1007/978-3-642-41360-5_21},

year  = {2013},

date = {2013-01-01},

booktitle = {Knowledge Engineering and the Semantic Web - 4th International Conference, 

KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings},

volume = {394},

pages = {258--264},

publisher = {Springer},

series = {Communications in Computer and Information Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/BuhmannL13,

title = {Pattern Based Knowledge Base Enrichment},

author = {Lorenz Bühmann and 

Jens Lehmann},

url = {https://doi.org/10.1007/978-3-642-41335-3_3},

doi = {10.1007/978-3-642-41335-3_3},

year  = {2013},

date = {2013-01-01},

booktitle = {The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, 

Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part I},

volume = {8218},

pages = {33--48},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/GerberHBSUN13,

title = {Real-Time RDF Extraction from Unstructured Data Streams},

author = {Daniel Gerber and 

Sebastian Hellmann and 

Lorenz Bühmann and 

Tommaso Soru and 

Ricardo Usbeck and 

Axel-Cyrille Ngonga Ngomo},

url = {https://doi.org/10.1007/978-3-642-41335-3_9},

doi = {10.1007/978-3-642-41335-3_9},

year  = {2013},

date = {2013-01-01},

booktitle = {The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, 

Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part I},

volume = {8218},

pages = {135--150},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/www/NgomoBULG13,

title = {Sorry, i don't speak SPARQL: translating SPARQL queries into natural 

language},

author = {Axel-Cyrille Ngonga Ngomo and 

Lorenz Bühmann and 

Christina Unger and 

Jens Lehmann and 

Daniel Gerber},

url = {https://doi.org/10.1145/2488388.2488473},

doi = {10.1145/2488388.2488473},

year  = {2013},

date = {2013-01-01},

booktitle = {22nd International World Wide Web Conference, WWW '13, Rio de Janeiro, 

Brazil, May 13-17, 2013},

pages = {977--988},

publisher = {International World Wide Web Conferences Steering Committee / ACM},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/www/NgomoBULG13a,

title = {SPARQL2NL: verbalizing sparql queries},

author = {Axel-Cyrille Ngonga Ngomo and 

Lorenz Bühmann and 

Christina Unger and 

Jens Lehmann and 

Daniel Gerber},

url = {https://doi.org/10.1145/2487788.2487936},

doi = {10.1145/2487788.2487936},

year  = {2013},

date = {2013-01-01},

booktitle = {22nd International World Wide Web Conference, WWW '13, Rio de Janeiro, 

Brazil, May 13-17, 2013, Companion Volume},

pages = {329--332},

publisher = {International World Wide Web Conferences Steering Committee / ACM},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/esws/ZamazalBS13,

title = {Checking and repairing ontological naming patterns using ORE and 

PatOMat},

author = {Ondrej Zamazal and 

Lorenz Bühmann and 

Vojtech Svátek},

url = {http://ceur-ws.org/Vol-999/paper6.pdf},

year  = {2013},

date = {2013-01-01},

booktitle = {Proceedings of the Second International Workshop on Debugging Ontologies 

and Ontology Mappings, Montpellier, France, May 27, 2013},

volume = {999},

pages = {69--76},

publisher = {CEUR-WS.org},

series = {CEUR Workshop Proceedings},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/ekaw/BuhmannL12,

title = {Universal OWL Axiom Enrichment for Large Knowledge Bases},

author = {Lorenz Bühmann and 

Jens Lehmann},

url = {https://doi.org/10.1007/978-3-642-33876-2_8},

doi = {10.1007/978-3-642-33876-2_8},

year  = {2012},

date = {2012-01-01},

booktitle = {Knowledge Engineering and Knowledge Management - 18th International 

Conference, EKAW 2012, Galway City, Ireland, October 8-12, 2012. 

Proceedings},

volume = {7603},

pages = {57--71},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/AuerBDEHILMMNSTW12,

title = {Managing the Life-Cycle of Linked Data with the LOD2 Stack},

author = {Sören Auer and 

Lorenz Bühmann and 

Christian Dirschl and 

Orri Erling and 

Michael Hausenblas and 

Robert Isele and 

Jens Lehmann and 

Michael Martin and 

Pablo N. Mendes and 

Bert Van Nuffelen and 

Claus Stadler and 

Sebastian Tramp and 

Hugh Williams},

url = {https://doi.org/10.1007/978-3-642-35173-0_1},

doi = {10.1007/978-3-642-35173-0_1},

year  = {2012},

date = {2012-01-01},

booktitle = {The Semantic Web - ISWC 2012 - 11th International Semantic Web Conference, 

Boston, MA, USA, November 11-15, 2012, Proceedings, Part II},

volume = {7650},

pages = {1--16},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/LehmannFGNSSUBGHLA12,

title = {deqa: Deep Web Extraction for Question Answering},

author = {Jens Lehmann and 

Tim Furche and 

Giovanni Grasso and 

Axel-Cyrille Ngonga Ngomo and 

Christian Schallhart and 

Andrew Jon Sellers and 

Christina Unger and 

Lorenz Bühmann and 

Daniel Gerber and 

Konrad Höffner and 

David Liu and 

Sören Auer},

url = {https://doi.org/10.1007/978-3-642-35173-0_9},

doi = {10.1007/978-3-642-35173-0_9},

year  = {2012},

date = {2012-01-01},

booktitle = {The Semantic Web - ISWC 2012 - 11th International Semantic Web Conference, 

Boston, MA, USA, November 11-15, 2012, Proceedings, Part II},

volume = {7650},

pages = {131--147},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/www/UngerBLNGC12,

title = {Template-based question answering over RDF data},

author = {Christina Unger and 

Lorenz Bühmann and 

Jens Lehmann and 

Axel-Cyrille Ngonga Ngomo and 

Daniel Gerber and 

Philipp Cimiano},

url = {https://doi.org/10.1145/2187836.2187923},

doi = {10.1145/2187836.2187923},

year  = {2012},

date = {2012-01-01},

booktitle = {Proceedings of the 21st World Wide Web Conference 2012, WWW 2012, 

Lyon, France, April 16-20, 2012},

pages = {639--648},

publisher = {ACM},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/esws/LehmannB11,

title = {AutoSPARQL: Let Users Query Your Knowledge Base},

author = {Jens Lehmann and 

Lorenz Bühmann},

url = {https://doi.org/10.1007/978-3-642-21034-1_5},

doi = {10.1007/978-3-642-21034-1_5},

year  = {2011},

date = {2011-01-01},

booktitle = {The Semantic Web: Research and Applications - 8th Extended Semantic 

Web Conference, ESWC 2011, Heraklion, Crete, Greece, May 29-June 

2, 2011, Proceedings, Part I},

volume = {6643},

pages = {63--79},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{DBLP:conf/semweb/LehmannB10,

title = {ORE - A Tool for Repairing and Enriching Knowledge Bases},

author = {Jens Lehmann and 

Lorenz Bühmann},

url = {https://doi.org/10.1007/978-3-642-17749-1_12},

doi = {10.1007/978-3-642-17749-1_12},

year  = {2010},

date = {2010-01-01},

booktitle = {The Semantic Web - ISWC 2010 - 9th International Semantic Web Conference, 

ISWC 2010, Shanghai, China, November 7-11, 2010, Revised Selected 

Papers, Part II},

volume = {6497},

pages = {177--193},

publisher = {Springer},

series = {Lecture Notes in Computer Science},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}