Jan Merker


2024

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DeepCT-enhanced Lexical Argument Retrieval
Alexander Bondarenko | Maik Fröbe | Danik Hollatz | Jan Merker | Matthias Hagen
Proceedings of the 11th Workshop on Argument Mining (ArgMining 2024)

The recent Touché lab’s argument retrieval task focuses on controversial topics like ‘Should bottled water be banned?’ and asks to retrieve relevant pro/con arguments. Interestingly, the most effective systems submitted to that task still are based on lexical retrieval models like BM25. In other domains, neural retrievers that capture semantics are more effective than lexical baselines. To add more “semantics” to argument retrieval, we propose to combine lexical models with DeepCT-based document term weights. Our evaluation shows that our approach is more effective than all the systems submitted to the Touché lab while being on par with modern neural re-rankers that themselves are computationally more expensive.