Task: Explanation
Input (English): Richard "The Secret" Williams ( (1971--) 09 1971 (age (2017)-(1971)-((11)<(05)or(11)==(05)and(30)<(09)) ) is an English professional light middle/middle/super middleweight boxer of the 1990s, 2000s and 2010s who won the International Boxing Organization (IBO) light middleweight title, and Commonwealth light middleweight title (twice), and was a challenger for the International Boxing Organization (IBO) light middleweight title against Sergio Gabriel Martinez, and British Boxing Board of Control (BBBofC) British middleweight title against Howard Eastman, his professional fighting weight varied from 149+3/4 lb , i.e. light middleweight to 162+1/4 lb , i.e. super middleweight. Richard Williams is trained by Brian Lawrence, and managed by Barry Hearn, and John Rooney. Question: Who reigned for 50 months as lineal champion  and fought Richard Williams? Answer: Sergio Gabriel Martínez
Output (English): Richard The Secret Williams  1971 09 1971 age 201719711105or11==05and3009  is an English professional light middlemiddlesuper middleweight boxer of the 1990s, 2000s and 2010s who won the International Boxing Organization IBO light middleweight title, and Commonwealth light middleweight title twice, and was a challenger for the International Boxing Organization IBO light middleweight title against Sergio Gabriel Martinez, and British Boxing Board of Control BBBofC British middleweight title against Howard Eastman, his professional fighting weight varied from 149+34 lb , i.e. light middleweight to 162+14 lb , i.e. super middleweight.