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 extremely advanced. Sentence2: I brought it home and called all my friends. Sentence3: They wanted to see it too. Sentence4: They were impressed with my phone.
A:
1, I went to the store to buy a phone.