Detailed Instructions: In this task, you're given four sentences of a story written in natural language in which one part is missing. Your job is to predict the position and missing part of the story and return in the following format: position, missing part. The missing part is a sentence that completes the story, and the position is the number of the missing sentence in the new story.
Q: Sentence1: It was a bright, warm day. Sentence2: He decided to walk to his local coffee shop. Sentence3: But halfway there, he started getting tired. Sentence4: Joe regret going outside.
A:
2, So Joe thought it would be nice to take a walk.