Previous researches have shown that sentence compression can be used effectively in automatic summarization systems to produce more informative summaries by reducing the redundancy in the summary sentences (Jing, 2000;Knight and Marcu, 2002;Lin, 2003;Daumé III and Marcu, 2005;Zajic et al., 2007;Madnani et al., 2007;Martins and Smith, 2009;Berg-Kirkpatrick et al., 2011).
most of these researches either focused on the task of single document summarization and generic summarization or did not consider global properties of the sentence compression problem (Clarke and Lapata, 2008).