Sentence 1: Zach wanted ice cream but he was sick. 
 Sentence 3: She tried to rush the ice cream back home to him 
 Sentence 4:  By the time it got there though, it had melted all over 
 Sentence 5:  Luckily, Zach still enjoyed the melty mess 
 Given Sentence 2: His girlfriend walked to the store to get him some.