Detailed Instructions: 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.
Q: Sentence1: Alice was painting during art class. Sentence2: Her teacher pointed out a mistake in her portrait. Sentence3: And she quickly improved it. Sentence4: Alice proudly left her easel when she finished the portrait.
A:
But she ended up knocking it on the floor.