The summarizer uses the following features, as reported in previous work (Edmundson, 1969;Brandow et al., 1995;Radev et al., 2001;Conroy et al., 2005;Aker and Gaizauskas, 2009; Aker and Gaizauskas, 2010a): • querySimilarity: Sentence similarity to the query (cosine similarity over the vector representation of the sentence and the query).
these sentenceLimit summaries have an average of 221 words, which explains the higher ROUGE recall scores seen in training compared to testing (where a 200 word limit was imposed).