Task: Coherence Classification
Input (English): Sentence 1: Tony and Marie have been dating for 5 years. 
 Sentence 3: He took Mary out for a romantic dinner 
 Sentence 4:  Tony pulled out a little blue box 
 Sentence 5:  He proposed to his love on Valentine's Day 
 Given Sentence 2: So, he decided to take their relationship a step further.
Output (English): Yes