Sentence 1: Alison's parents had long talked about going up in a hot air balloon. 
 Sentence 3: Alison decided to buy them a ride for their anniversary 
 Sentence 4:  Her parents were beyond excited when they found out 
 Sentence 5:  They said it was one of the best experiences they've ever shared 
 Given Sentence 2: Suddenly, she was approached by a boy with a card and box.