Question: Who did the fighter, who had vacated the British light heavyweight title that Dennis Powell won, defeat to become world middleweight champion ?
Sentence (from "Peter Oboh"): Peter Oboh ( (1968--) 06 1968 (age (2017)-(1968)-((11)<(09)or(11)==(09)and(30)<(06)) ) ) born in Lagos is a Nigerian/British professional light heavy/cruiser/heavyweight boxer of the 1990s and 2000s who won the British Boxing Board of Control (BBBofC) British light heavyweight title, World Boxing Association (WBA) Inter-Continental light heavyweight title, and Commonwealth light heavyweight title, his professional fighting weight varied from 171+3/4 lb , i.e. light heavyweight to 196 lb , i.e. heavyweight.
Relevant evidence: No