Question: What company is a 1931-born rival promoter to Don King in the 1980's the CEO of?
Sentence (from "Boxing in the 1980s"): Boxing in the 1980s was shaped by many different situations, such as the continuous corporate battles between the different world sanctioning organizations, the void left by Muhammad Ali as the sport's ambassador and consequent search for a new boxing hero, the continuous presence of Don King as the sport's most famous promoter, the surge of rival promoters as Bob Arum, Butch Lewis and Murad Muhammad, and major rule changes.
Relevant evidence: Yes