Task: Coherence Classification
Input (English): Sentence 1: Bobby buys a cheap stereo on craigslist. 
 Sentence 3: They inform him that the stereo is stolen 
 Sentence 4:  They ask him some questions, confiscate the stereo and leave 
 Sentence 5:  He vows to never buy anything on craigslist again 
 Option 1: Three weeks later the police show up at his house. 
 Option 2: Three weeks later the salesman shows up at his house.
Output (English): Option 1