Task: Text Completion
Input (English): Sentence1: Lewis knew the cave like the back of his hand. Sentence2: Five first-time cavers walked behind him. Sentence3: Suddenly, a few bats flew down from the darkness above. Sentence4: All the people but Lewis ran back towards the cave's entrance. 
 (A) Lewis started to dance. (B) Lewis laughed and told them not be afraid of the bats.
Output (English): B