Task: Coherence Classification
Input (English): Sentence 1: John was invited for a lunch by his boss. 
 Sentence 3: He did not expect his boss to invite him for a lunch 
 Sentence 4:  He tried to find some excuse 
 Sentence 5:  He told the boss he already had a lunch plans 
 Option 1: John got nervous. 
 Option 2: John had been expecting this.
Output (English): Option 1