Task: Coherence Classification
Input (English): Sentence 1: I once wanted to have a pet frog. 
 Sentence 3: My friends laughed and said that frogs cannot be purple 
 Sentence 4:  I looked in several books and found out there really are purple frogs 
 Sentence 5:  I enjoyed telling my friends that they were wrong 
 Given Sentence 2: He waited and waited but no mom.
Output (English): No