id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_j4ym2limgffn3isereirctplfi	Wei Xu	Problems in Current Text Simplification Research: New Data Can Help	2015	16	.pdf	application/pdf	8077	899	61	Simple Wikipedia has dominated simplification research in the past 5 years. reasons: 1) It is prone to automatic sentence alignment errors; 2) It contains a large proportion of inadequate simplifications; 3) It generalizes poorly to the sentence pairs in the PWKP corpus are not simplifications. Table 1: Example sentence pairs (NORM-SIMP) aligned between English Wikipedia and Simple English The breakdown in percentages is obtained through manual examination of 200 randomly sampled sentence pairs in the Parallel Wikipedia Simplification (PWKP) corpus. Siddharthan (2014)'s excellent survey of text simplification research states The Parallel Wikipedia Simplification (PWKP) corpus (Zhu et al., 2010) contains approximately Table 3: Example of sentences written at multiple levels of text complexity from the Newsela data set. Table 5: This table shows the vocabulary changes between different levels of simplification in the Newsela topics and degree of simplification between the Simple Wikipedia and the Newsela corpus.	./cache/work_j4ym2limgffn3isereirctplfi.pdf	./txt/work_j4ym2limgffn3isereirctplfi.txt