Sentence 1: Michael hated Rob. 
 Sentence 3: One day rob was with Shelley in the hallway 
 Sentence 4:  Michael coincidentally was passing by so he saw them together 
 Sentence 5:  Michael and Rob got into a fight 
 Option 1: Most think that the reason is because Rob stole his girlfriends Lila. 
 Option 2: Most think that the reason is because rob stole his girlfriend Shelly.