Task: Coherence Classification
Input (English): Sentence 1: Nick's old smart phone was very slow. 
 Sentence 3: Nick went to the store 
 Sentence 4:  He purchased a much faster smartphone 
 Sentence 5:  Nick is much happier with his new device 
 Option 1: He bought a new smartphone online. 
 Option 2: He researched his options for a new smartphone.
Output (English): Option 2