Sentence 1: Mary's son had been begging her to buy a certain video game. 
 Sentence 3: She checked the library website to see if the game was available 
 Sentence 4:  She checked out the game from the library 
 Sentence 5:  Her son played the game a few times before growing bored with it 
 Given Sentence 2: Mary did not want to buy another expensive game.