@inproceedings{ML-1991-HirakiGYA,
	author        = "Kazuo Hiraki and John H. Gennari and Yoshinobu Yamamoto and Yuichiro Anzai",
	booktitle     = "{Proceedings of the Eighth International Workshop on Machine Learning}",
	isbn          = "1-55860-200-3",
	pages         = "407--411",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Learning Spatial Relations from Images}",
	year          = 1991,
}