Data-Driven Sentence Simplification: Survey and Benchmark Fernando Alva-Manchego author Carolina Scarton author Lucia Specia author 2020 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal alva-manchego-etal-2020-data 10.1162/coli_a_00370 https://aclanthology.org/2020.cl-1.4/ 2020 46 1 135 187