Task: Text Completion
Input (English): Sentence1: There was a gas leak in a house down the street. Sentence2: The people who lived there did not know. Sentence3: They left for work one day, and the gas filled up the house. Sentence4: A small spark caused the house to explode. 
 (A) They then got home to their neatly cleaned home. (B) When they returned, they saw that their house was gone.
Output (English): A