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: Sandy was homeless. Sentence2: She had been sleeping on the park bench for the past month. Sentence3: It was her birthday tomorrow and she felt lonely. Sentence4: The next day a girl she had met at the park visited her.

She bought her cake because she remembered it was Sandy's birthday.