Squibs and Discussions: Human Variation and Lexical Choice Ehud Reiter author Somayajulu Sripada author 2002 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal reiter-sripada-2002-squibs 10.1162/089120102762671981 https://aclanthology.org/J02-4007/ 2002 28 4 545 553