Task: Coherence Classification
Input (English): Sentence 1: The American scientists have been working on a bomb. 
 Sentence 3: They assembled all the materials 
 Sentence 4:  Finally the day to test it came 
 Sentence 5:  The gadget worked 
 Option 1: They worked on a design. 
 Option 2: They gave up on designing it.
Output (English): Option 1