Question: Who is older, David Yellin or Percy Heggaton?
Sentence (from "Richard Curwin"): Richard Curwin( May 25, 1944- December 26, 2018) was an expert in the fields of school discipline and classroom management, and taught at the State University of New York at Geneseo, the National Technical Institute for the Deaf, San Francisco State University and David Yellin College in Jerusalem.
Relevant evidence: No