@article{sidner-1978-use, title = "The Use of Focus as a Tool for Disambiguation of Definite Noun Phrases", author = "Sidner, Candace L.", editor = "Hays, David G.", journal = "American Journal of Computational Linguistics", month = dec, year = "1978", note = "Microfiche 78", url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/J78-3018/", pages = "88--97" }