Task: Coherence Classification
Input (English): Sentence 1: Greg had just listened to a very popular song. 
 Sentence 3: He kept humming the song for weeks on end 
 Sentence 4:  After a couple of weeks, Greg heard another popular song 
 Sentence 5:  Now that song's stuck in his head 
 Given Sentence 2: After a couple of hours he realized it was stuck in his head.
Output (English): Yes