Sentence 1: Ana's seat was in the front row of her college class. 
 Sentence 3: Every day she could feel him staring at her the whole time 
 Sentence 4:  One day, Anna had enough and turned to yell at him 
 Sentence 5:  She realized then he had a mental disability and felt bad about it 
 Given Sentence 2: The boy in the seat behind her made her very nervous.