Sentence 1: Tiffany's boyfriend loved video games. 
 Sentence 3: She went out and bought a game that he had his eye on 
 Sentence 4:  She wrapped it and on his birthday she went to his house 
 Sentence 5:  When she gave the gift, he told her that he already owned the game 
 Given Sentence 2: His birthday was coming up and she wanted to surprise him.