Research Group Leader at L3S Research Center, Leibniz University Hannover
2025
Transformer-Based Architectures versus Large Language Models in Semantic Event Extraction: Evaluating Strengths and Limitations. Tin Kuculo, Sara Abdollahi, Simon Gottschalk Semantic Web Journal (SWJ) — Journal article
Retrieval-Augmented Generation of Event Collections from Web Archives and the Live Web. Sara Abdollahi, Wolfgang Nejdl, Simon Gottschalk International Journal on Digital Libraries (IJDL) — Journal article
Aligning Visual Contrastive learning models via Preference Optimization. Amirabbas Afzali, Borna khodabandeh, Ali Rasekh, Mahyar JafariNodeh, Sepehr Kazemi Ranjbar, Simon Gottschalk The Thirteenth International Conference on Learning Representations (ICLR) — research paper
2024
Event Analytics across Languages and Communities. Editors: Ivana Marenzi, Simon Gottschalk, Eric Müller-Budack, Marko Tadić and Jane Winters Springer Nature — book (Link)
Preface. Simon Gottschalk
Collection and Integration of Event-Centric Information in Cross-Lingual Knowledge Graphs. Simon Gottschalk — book chapter (Link)
Event Analysis Through QuoteKG: A Multilingual Knowledge Graph of Quotes. Tin Kuculo, Simon Gottschalk — book chapter (Link)
Event Recommendation Through Language-Specific User Behaviour in Clickstreams. Sara Abdollahi, Elena Demidova, Simon Gottschalk — book chapter (Link)
Generating a Question Answering Dataset about Geographic Changes in a Knowledge Graph. Michael Mitsios, Dharmen Punjani, Sara Abdollahi, Simon Gottschalk, Eleni Tsalapati, Elena Demidova and Manolis Koubarakis 24th International Conference on Knowledge Engineering and Knowledge Management (EKAW) — research paper
Transferring Traffic Predictions to Urban Regions without Target Data. Stefan Schestakov, Simon Gottschalk, Nicolas Tempelmeier, Thorben Funke and Elena Demidova. IEEE International Conference on Intelligent Transportation Systems (ITSC) — research paper
Spatially Constrained Transformer with Efficient Global Relation Modelling for Spatio-Temporal Prediction. Ashutosh Sao and Simon Gottschalk. 27th European Conference on Artificial Intelligence (ECAI) — research paper
Evaluating Entity Importance in a Cross-National Context using Crowdsourcing and Best–Worst Scaling. Aleksandr Perevalov, Sara Abdollahi, Simon Gottschalk and Andreas Both. 28th International Conference on Knowledge-Based and Intelligent Information & Engineering Systems (KES) — research paper
RE-Trace: Re-Identification of Modified GPS Trajectories . Stefan Schestakov, Simon Gottschalk, Thorben Funke and Elena Demidova. ACM Transactions on Spatial Algorithms and Systems — Journal article
Event-specific Document Ranking through Multi-stage Query Expansion Using Knowledge Graphs. Sara Abdollahi, Tin Kuculo, and Simon Gottschalk. European Conference on Information Retrieval (ECIR) — research paper
2023
Entity Typing with Triples using Language Models. Aniqa Riaz, Sara Abdollahi, and Simon Gottschalk. Extended Semantic Web Conference (ESWC) — poster paper
MetaCitta: Deep Meta-Learning for Spatio-Temporal Prediction Across Cities and Tasks. Ashutosh Sao, Simon Gottschalk , Nicolas Tempelmeier, and Elena Demidova. Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD) — research paper
LaSER: Language-specific event recommendation. Sara Abdollahi, Simon Gottschalk, and Elena Demidova. Journal of Web Semantics — Journal article (Link)
WorldKG: World-Scale Completion of Geographic Information. Alishiba Dsouza, Nicolas Tempelmeier, Simon Gottschalk, Ran Yu, Elena Demidova.. Volunteered Geographic Information — book chapter (Link)
2022
Creating Knowledge Graphs for Geographic Data on the Web. Elena Demidova, Alishiba Dsouza, Simon Gottschalk, Nicolas Tempelmeier, and Ran Yu. SIGWEB Newsletter (Winter 2022) — newsletter article (Link)
Linking Streets in OpenStreetMap to Persons in Wikidata Daria Gurtovoy and Simon Gottschalk The Web Conference (TheWebConf). 2022 — poster paper (Link, digital poster)
QuoteKG: A Multilingual Knowledge Graph of Quotes Tin Kuculo, Simon Gottschalk and Elena Demidova European Semantic Web Conference (ESWC). Springer, Cham, 2022 — resource paper (Link)
Tab2KG: Semantic Table Interpretation with Lightweight Semantic Profiles Simon Gottschalk and Elena Demidova Semantic Web Journal (SWJ), 2022 — Journal article(Link)
2021
Creation, Enrichment and Application of Knowledge Graphs Simon Gottschalk. Repository of the Leibniz Universität Hannover, 2021 — PhD thesis (Link & Summary)
GeoVectors: A Linked Open Corpus of OpenStreetMap Embeddings on a World Scale Nicolas Tempelmeier, Simon Gottschalk, Elena Demidova. 30th ACM International Conference on Information and Knowledge Management (CIKM), 2021 — resource paper.
WorldKG: A World-Scale Geographic Knowledge Graph Alishiba Dsouza, Nicolas Tempelmeier, Ran Yu, Simon Gottschalk, Elena Demidova. 30th ACM International Conference on Information and Knowledge Management (CIKM), 2021 — resource paper.
Visually Connecting Historical Figures Through Event Knowledge Graphs Shahid Latif, Shivam Agarwal, Simon Gottschalk, Carina Chrosch, Felix Feit, Johannes Jahn, Tobias Braun, Yanick Christian Tchenko, Elena Demidova, Fabian Beck. IEEE Visualization Conference (VIS), 2021 — short paper.
OEKG: The Open Event Knowledge Graph Simon Gottschalk, Endri Kacupaj, Sara Abdollahi, Diego Alves, Gabriel Amaral, Elisavet Koutsiana, Tin Kuculo, Daniela Major, Caio Mello, Gullal S. Cheema, Abdul Sittar, Swati, Golsa Tahmasebzadeh and Gaurish Thakkar CLEOPATRA workshop @TheWebConf, 2021 — workshop paper. BEST PAPER AWARD.
2020
EventKG+BT: Generation of Interactive Biography Timelines from a Knowledge Graph Simon Gottschalk and Elena Demidova European Semantic Web Conference (Satellite Events), 2020 — demo paper
EventKG+Click: A Dataset of Language-specific Event-centric User Interaction Traces Sara Abdollahi, Simon Gottschalk and Elena Demidova CLEOPATRA workshop @International Semantic Web Conference (ISWC), 2020 — workshop paper
Event-QA: A Dataset for Event-Centric Question Answering over Knowledge Graphs Tarcísio Souza Costa, Simon Gottschalk and Elena Demidova 29th ACM International Conference on Information and Knowledge Management (CIKM), 2020 — resource paper
2019
HapPenIng: Happen, Predict, Infer — Event Series Completion in a Knowledge Graph Simon Gottschalk and Elena Demidova International Semantic Web Conference (ISWC), 2019 — research paper
EventKG - the Hub of Event Knowledge on the Web - and Biographical Timeline Generation Simon Gottschalk and Elena Demidova Semantic Web Journal (SWJ), 2019 — Journal article
Simple-ML: Towards a Framework for Semantic Data Analytics Workflows Simon Gottschalk, Nicolas Tempelmeier, Günter Kniesel, Vasileios Iosifidis, Besnik Fetahu and Elena Demidova SEMANTiCS, 2019 — short paper
2018
EventKG: A Multilingual Event-centric Temporal Knowledge Graph Simon Gottschalk and Elena Demidova European Semantic Web Conference (ESWC). Springer, Cham, 2018 — resource paper
Towards Better Understanding Researcher Strategies in Cross-Lingual Event Analytics Simon Gottschalk, Viola Bernacchi, Richard Rogers, Elena Demidova International Conference on Theory and Practice of Digital Libraries, 139-151 — research paper
EventKG+TL: Creating Cross-Lingual Timelines from an Event-Centric Knowledge Graph Simon Gottschalk and Elena Demidova European Semantic Web Conference (Satellite Events) 2018: 164-169 — demo paper
2017
MultiWiki: Interlingual Text Passage Alignment in Wikipedia Simon Gottschalk and Elena Demidova ACM Transactions on the Web (TWEB) 11 (1), 6 — Journal article
Ongoing Events in Wikipedia: a Cross-lingual Case Study Simon Gottschalk, Elena Demidova, Viola Bernacchi, Richard Rogers 2017 ACM on Web Science Conference (WebSci) — extended abstract
Unsupervised Open Relation Extraction Hady Elsahar, Elena Demidova, Simon Gottschalk, Christophe Gravier, Frederique Laforest European Semantic Web Conference (ESWC). Springer, Cham, 2017. — short paper
2016
Analysing Temporal Evolution of Interlingual Wikipedia Article Pairs Simon Gottschalk and Elena Demidova 39th International ACM SIGIR conference on Research and Development in Information Retrieval (SIGIR). ACM, 2016. — demo paper