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 caterpillar was crawling along a wall. Sentence2: A nearby student was walking from class when he saw the caterpillar. Sentence3: He observed it fall from the wall onto the ground. Sentence4: Feeling pity, the student took a leaf and picked up the caterpillar.
He placed the caterpillar on a nearby tree.