Nancy Green Jennifer Chu-Carroll David Kortenkamp Alan C. Schultz Michael H. Coen Dragomir R. Radev Eduard H. Hovy Peter Haddawy Steve Hanks Eugene C. Freuder Charlie Ortiz Sandip Sen The AAAI Spring Symposia. 83-86 1999 20 AI Magazine 3 db/journals/aim/aim20.html#GreenCKSCRHHHFOS99 http://www.aaai.org/ojs/index.php/aimagazine/article/view/1469