55 citations · 60 across the 11 of their papers we have counts for
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RAG-based Question Answering over Heterogeneous Data and Text
Philipp Christmann, Gerhard Weikum
This article presents the QUASAR system for question answering over unstructured text, structured tables, and knowledge graphs, with unified treatment of all sources. The system ad…
Retrieving Contextual Information for Long-Form Question Answering using Weak Supervision
Philipp Christmann, Svitlana Vakulenko, Ionut Teodor Sorodoc +2
Long-form question answering (LFQA) aims at generating in-depth answers to end-user questions, providing relevant information beyond the direct answer. However, existing retrievers…
Faithful Temporal Question Answering over Heterogeneous Sources
Zhen Jia, Philipp Christmann, Gerhard Weikum
Temporal question answering (QA) involves time constraints, with phrases such as "... in 2019" or "... before COVID". In the former, time is an explicit condition, in the latter it…