Task: Coherence Classification
Input (English): Sentence 1: Viktor could not get his microscope to focus. 
 Sentence 3: His professor also could not get it to focus 
 Sentence 4:  The professor wiped the lens with a solvent 
 Sentence 5:  He was then able to focus the lens 
 Option 1: His professor fixed it for him. 
 Option 2: His professor came to help.
Output (English): Option 2