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: Two archaeologists were digging around in the desert. Sentence2: They found a strange looking rock covered in lumps. Sentence3: Curious, they brought it back to the university. Sentence4: One of the professors started laughing.
He informed them it was a fertility idol, shaped like a chubby woman!