Task: Coherence Classification
Input (English): Sentence 1: Nancy was a cigarette smoker. 
 Sentence 3: As they got older, Nancy's friend got cancer 
 Sentence 4:  Nancy became alarmed and treated it as a wake up call 
 Sentence 5:  Nancy quit smoking after her friend died 
 Given Sentence 2: Her best friend smoked as well.
Output (English): Yes