Sentence 1: Gina was on a side street getting on the main street. 
 Sentence 3: Gina's car was having a hard time getting up the hill 
 Sentence 4:  She realized she would need to back up to get up the hill 
 Sentence 5:  Just then a van pulled up behind her and she was unable to back up 
 Given Sentence 2: But the streets were icy, and the side street was a hill.