AUEB at BioASQ 6: Document and Snippet Retrieval George Brokos author Polyvios Liosis author Ryan McDonald author Dimitris Pappas author Ion Androutsopoulos author 2018-11 text Proceedings of the 6th BioASQ Workshop A challenge on large-scale biomedical semantic indexing and question answering Ioannis A Kakadiaris editor George Paliouras editor Anastasia Krithara editor Association for Computational Linguistics Brussels, Belgium conference publication brokos-etal-2018-aueb 10.18653/v1/W18-5304 https://aclanthology.org/W18-5304/ 2018-11 30 39