@book{ZZZ-Bates:1993,
title = {Challenges in Natural Language Processing},
address = {Cambridge},
booktitle = {Challenges in Natural Language Processing},
editor = {Madeleine Bates and Ralph M. Weischedel},
publisher = {Cambridge University Press},
series = {Studies in Natural Language Processing},
year = {1993},
keywords = {NLP }
}
::