1 code implementation • COLING 2022 • Alexander Bondarenko, Magdalena Wolska, Stefan Heindorf, Lukas Blübaum, Axel-Cyrille Ngonga Ngomo, Benno Stein, Pavel Braslavski, Matthias Hagen, Martin Potthast
At least 5% of questions submitted to search engines ask about cause-effect relationships in some way.
1 code implementation • 5 Nov 2023 • Lukas Blübaum, Stefan Heindorf
We introduce an Actor-Critic-based agent which learns to search through the graph to answer causal questions.
1 code implementation • 23 Oct 2023 • N'Dah Jean Kouagou, Caglar Demir, Hamada M. Zahera, Adrian Wilke, Stefan Heindorf, Jiayi Li, Axel-Cyrille Ngonga Ngomo
Most of them obtain embeddings by learning the structure of the knowledge graph within a link prediction setting.
1 code implementation • 28 Apr 2023 • Caglar Demir, Michel Wiebesiek, Renzhong Lu, Axel-Cyrille Ngonga Ngomo, Stefan Heindorf
We evaluate LitCQD on query types with and without literal values.
no code implementations • 12 Jan 2023 • Leonie Nora Sieger, Stefan Heindorf, Yasir Mahmood, Lukas Blübaum, Axel-Cyrille Ngonga Ngomo
Knowledge bases are widely used for information management, enabling high-impact applications such as web search, question answering, and natural language processing.
no code implementations • 16 Nov 2021 • N'Dah Jean Kouagou, Stefan Heindorf, Caglar Demir, Axel-Cyrille Ngonga Ngomo
Our main intuition is that class expression learning can be regarded as a translation problem.
1 code implementation • 8 Nov 2021 • Stefan Heindorf, Lukas Blübaum, Nick Düsterhus, Till Werner, Varun Nandkumar Golani, Caglar Demir, Axel-Cyrille Ngonga Ngomo
We contribute a novel initialization method for the initial population: starting from positive examples, we perform biased random walks and translate them to description logic concepts.
1 code implementation • 10 Jul 2021 • N'Dah Jean Kouagou, Stefan Heindorf, Caglar Demir, Axel-Cyrille Ngonga Ngomo
We then extend the CELOE algorithm, which learns ALC concepts, with our concept length predictor.
1 code implementation • 29 Jun 2021 • Caglar Demir, Diego Moussallem, Stefan Heindorf, Axel-Cyrille Ngonga Ngomo
We propose the four approaches QMult, OMult, ConvQ and ConvO to tackle the link prediction problem.