Our work builds on sequence-to-sequence models (Sutskever et al., 2014; Bahdanau et al., 2015) , which have been extensively applied to the task of abstractive summarization (Rush et al., 2015; Chopra et al., 2016; Nallapati et al., 2016; See et al., 2017; <cite>Paulus et al., 2017)</cite> .