Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: Anna has lost twenty pound in three months. Sentence2: Her friends aren't sure what her secret is. Sentence3: Last week they decided to ask her. Sentence4: She said she was working out and eating better.

Anna's friends were surprised by her simple methods.