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: Franco visited his grandfather's farm last week. Sentence2: He discovered a very old trail that led to a rundown shack. Sentence3: Franco found a small trunk while exploring the shack. Sentence4: Inside the trunk was several piece of gold from the Spanish Armada.

Franco became very rich when he sold the gold to a museum.