Four unsupervised algorithms (Tf-Idf, Tex-tRank (Mihalcea and Tarau, 2004), SingleRank (Wan and Xiao, 2008), and ExpandRank (Wan and Xiao, 2008)) and two supervised algorithms (KEA (Witten et al., 1999) and Maui (Medelyan et al., 2009a)) are adopted as baselines.
we would like to thank Jiatao Gu and Miltiadis Allamanis for sharing the source code and giving helpful advice.