It has attracted much attention recently as it could make texts more accessible to wider audiences (Aluísio and Gasperin, 2010;, and used as a pre-processing step, improve performances of various NLP tasks and systems (Vickrey and Koller, 2008;Evans, 2011;Stajner and Popović, 2016).
10 Second, three native English speakers rate the grammaticality (G) and meaning preservation (M) of each sentence with at least one change on a 1-5 Likert scale (1very bad; 5 -very good).