You will be given a definition of a task first, then some input of the task.
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: Carol had a bunch of obsolete computer manuals she had no use for. Sentence2: She didn't want to throw them out and create more trash. Sentence3: Carol had an inspired idea! Sentence4: She and her friends built large trebuchets in their backyards.
Output:
They had some epic medieval style fights, using the books as ammo.