Question: When is Ron Garretson's father's birthday?
Sentence (from "Darell Garretson"): Darell Lee Garretson (March 18, 1932 – April 21, 2008) was an American professional basketball referee in the National Basketball Association (NBA) for 27 years from 1967 to 1994, and he later served as NBA Supervisor of Officials for 17 years from 1981 to 1998.
Relevant evidence: Yes