Sentence 1: Joe would always forget to pay his parking tickets. 
 Sentence 3: Joe thought that he could just wait to pay his tickets 
 Sentence 4:  One day Joe parked on the street where a street sweeper went by 
 Sentence 5:  Joe had so many unpaid tickets that his BMW got towed away 
 Given Sentence 2: Joe had about 4 parking tickets that he had to pay.