Sentence 1: People remember their fights, but one fight Charles will never forget. 
 Sentence 3: She passed the phone to a guy who started arguing 
 Sentence 4:  Charles told this guy where to meet for a fight 
 Sentence 5:  That guy punched Charles in the mouth so hard he needed stitches 
 Given Sentence 2: He called his x-girlfriend and said he didn't know if the kid was his?