Task: Coherence Classification
Input (English): Sentence 1: I was practicing Korean during the afternoon. 
 Sentence 3: I went on Ebay to search for more learning resources 
 Sentence 4:  Several were for sale such as comic books 
 Sentence 5:  I decided to purchase on of the books 
 Given Sentence 2: However, I became frustrated since it was hard to comprehend it.
Output (English): Yes