Task: Coherence Classification
Input (English): Sentence 1: Bill could not sleep at night. 
 Sentence 3: Bill fluffed up the pillow but that did not work 
 Sentence 4:  He reached in the dark for a second pillow 
 Sentence 5:  The two pillows were stacked atop each other and Bill slept soundly 
 Given Sentence 2: He felt that his pillow was too flat.
Output (English): Yes