Task: Coherence Classification
Input (English): Sentence 1: The city shook with a huge boom. 
 Sentence 3: The citizens fled the area 
 Sentence 4:  They all took cover in their homes 
 Sentence 5:  It had been a very scary day for them 
 Option 1: Fireworks were happening in the city's center. 
 Option 2: A bomb had exploded in the city's center.
Output (English): Option 2