Michael J. Witbrock Cynthia Matuszek Antoine Brusseau Robert C. Kahlert C. Bruce Fraser Douglas B. Lenat Knowledge Begets Knowledge: Steps towards Assisted Knowledge Acquisition in Cyc. 99-105 2005 AAAI Spring Symposium: Knowledge Collection from Volunteer Contributors http://www.aaai.org/Library/Symposia/Spring/2005/ss05-03-015.php conf/aaaiss/2005-3 db/conf/aaaiss/aaaiss2005-3.html#WitbrockMBKFL05