"Lafferty,John D."@en . . . . "John D. Lafferty"@en . . "John D. Lafferty is an American scientist, Louis Block Professor at the University of Chicago and leading researcher in machine learning. He is best known for proposing the Conditional Random Fields with Andrew McCallum and Fernando C.N. Pereira."@en . . . "American artificial intelligence researcher" . . . . . .