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: While they were there they found a stray dog. Sentence2: They carried the dog back to their apartment. Sentence3: They posted an ad online to try to find the owner. Sentence4: They never found the owner and kept the dog.
[A]: 1, Doug and Molly decided to go the park to take a walk.

[Q]: Sentence1: Billy wanted to become a doctor. Sentence2: He went to college to become a doctor. Sentence3: Billy became a nurse instead of a doctor. Sentence4: He never regretted his decision.
[A]: 3, After he graduated with his degree, he changed his mind.

[Q]: Sentence1: Jack and Chad climbed down the Grand Canyon Wall. Sentence2: Jack paused to take a picture, leaning to get a good shot angle. Sentence3: Needles were now stuck in Jack's pants. Sentence4: It took 20 minutes to remove the needles and continue climbing.
[A]:
3, Jack accidentally sat on a cactus.