@inproceedings{wilks-1990-progress, title = "PROGRESS REPORT: Active Knowledge Structures in Natural Language Understanding", author = "Wilks, Yorick", booktitle = "Speech and Natural Language: Proceedings of a Workshop Held at Hidden Valley, {P}ennsylvania, June 24-27,1990", year = "1990", url = "https://preview.aclanthology.org/fix-sig-urls/H90-1093/" }