Question: The 1989–90 NBA season was the Bulls' 24th season in the National Basketball Association, despite their solid playoff run last year, the Bulls fired head coach Doug Collins and replaced him with who, a former American professional basketball player, coach and executive in the National Basketball Association (NBA)?
Sentence (from "List of Philadelphia 76ers head coaches"): Brett Brown was hired to be the head coach of the 76ers on August 15, 2013 prior to the start of the 2013-14 season.
Relevant evidence: No