Sentence 1: Karl was a good baseball player in his youth. 
 Sentence 3: Karl is very competitive and will do anything to win 
 Sentence 4:  One day, he slid into second base to beat a throw and hurt his knee 
 Sentence 5:  The injury made Karl realize that he wasn't young anymore 
 Given Sentence 2: As a middle-aged man, he joined an adult baseball team.