Task: Coherence Classification
Input (English): Sentence 1: I once dreamed of having my own guitar. 
 Sentence 3: I ask my friend to teach me how to play it but i still can't 
 Sentence 4:  I tried to ask my brother to teach but still i can't 
 Sentence 5:  Until i decided to quit and find another hobby 
 Given Sentence 2: But before buying my own guitar i have to learn how to play it.
Output (English): Yes