Mark Craven Dan DiPasquo Dayne Freitag Andrew McCallum Tom M. Mitchell Kamal Nigam Seán Slattery Learning to Extract Symbolic Knowledge from the World Wide Web. 509-516 1998 conf/aaai/1998 AAAI/IAAI db/conf/aaai/aaai98.html#CravenFMMNS98 http://www.aaai.org/Library/AAAI/1998/aaai98-072.php