Sentence 1: Little Susie wanted a puppy all of her young life. 
 Sentence 3: Susie's brother was allergic, so they couldn't get one 
 Sentence 4:  However, one day, he went off to college 
 Sentence 5:  Susie's parents finally got her the puppy she always wanted! 
 Given Sentence 2: It was a snowy rush hour so they were backed up.