SubmissionNumber#=%=#15 FinalPaperTitle#=%=#Supervising the Centroid Baseline for Extractive Multi-Document Summarization ShortPaperTitle#=%=# NumberOfPages#=%=#10 CopyrightSigned#=%=#Simão Gonçalves JobTitle#==# Organization#==# Abstract#==#The centroid method is a simple approach for extractive multi-document summarization and many improvements to its pipeline have been proposed. We further refine it by adding a beam search process to the sentence selection and also a centroid estimation attention model that leads to improved results. We demonstrate this in several multi-document summarization datasets, including in a multilingual scenario. Author{1}{Firstname}#=%=#Simão Author{1}{Lastname}#=%=#Gonçalves Author{1}{Email}#=%=#simao.goncalves@priberam.pt Author{1}{Affiliation}#=%=#Priberam Author{2}{Firstname}#=%=#Gonçalo Author{2}{Lastname}#=%=#Correia Author{2}{Username}#=%=#goncalomcorreia Author{2}{Email}#=%=#goncalommac@gmail.com Author{2}{Affiliation}#=%=#Priberam Author{3}{Firstname}#=%=#Diogo Author{3}{Lastname}#=%=#Pernes Author{3}{Username}#=%=#dpernes Author{3}{Email}#=%=#diogo.pernes@priberam.pt Author{3}{Affiliation}#=%=#Priberam; University of Porto Author{4}{Firstname}#=%=#Afonso Author{4}{Lastname}#=%=#Mendes Author{4}{Username}#=%=#afonsoamendes Author{4}{Email}#=%=#amm@priberam.pt Author{4}{Affiliation}#=%=#Priberam Informática, SA. ========== èéáğö