Due to the difficulty of abstractive sentence compression, there was only a limited number of work on the task (Cohn and Lapata, 2008;Cohn and Lapata, 2013;Galanis and Androutsopoulos, 2011;Coster and Kauchak, 2011a).
with the recent success of the sequence-to-sequence (Seq2Seq) model, the task of abstractive sentence compression has become viable.