Task: Text Completion
Input (English): Sentence1: One day, police were investigating a crime scene. Sentence2: They were stuck on where to go next. Sentence3: They got a tip to check behind the library. Sentence4: There they found some key evidence. 
 (A) The police found the perpetrator and locked her up. (B) The police put on a community event to raise money.
Output (English): A