Task: Coherence Classification
Input (English): Sentence 1: Wilton was an economics professor at the local community college. 
 Sentence 3: None of his students understood the lesson 
 Sentence 4:  Wilton became very frustrated at his class 
 Sentence 5:  He decided to go the dean and quit 
 Option 1: He had been sleeping with a student. 
 Option 2: He decided to teach a class on supply and demand.
Output (English): Option 2