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: Harry was doing his homework but had trouble with math. Sentence2: After doing a few lessons, he saw an interesting video. Sentence3: The video was exciting and so he decided to watch another. Sentence4: Harry finally overcame the distraction and returned to his math.
A: 
2, He decided to look for help on Youtube.