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: Celina is very old. Sentence2: Her hips are always sore. Sentence3: It is hard for her to walk. Sentence4: One day, she obtained a walker.

It helped her a lot.