Q: 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.
Sentence1: A scientist discovers that there is a disease beginning to spread. Sentence2: He works on a cure for the disease in his lab. Sentence3: Other scientists gather to help him with his work. Sentence4: Several weeks go by and they manage to develop a cure.
A:
They save the world.