Task: Coherence Classification
Input (English): Sentence 1: Tom was drinking tap water. 
 Sentence 3: He was worried something was wrong with his tap water 
 Sentence 4:  So he installed a water filter 
 Sentence 5:  And the water tasted much better 
 Given Sentence 2: But not matter how much he drank, he was still thirsty.
Output (English): Yes