TASK DEFINITION: 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.
PROBLEM: Sentence1: The high school student went to the dentist. Sentence2: She was not happy. Sentence3: She got braces and was in a lot of pain. Sentence4: But it was worth it when she saw her straightened teeth.

SOLUTION: 2, She was told she needed braces again.

PROBLEM: Sentence1: Candy woke up excited because it was her birthday. Sentence2: But the whole day went by and no one gave her any gifts. Sentence3: She began to feel depressed and thought everyone had forgotten. Sentence4: She didn't want to binge eat out of depression.

SOLUTION: 4, Later, she got hungry and headed for the kitchen, but stopped.

PROBLEM: Sentence1: I went to go hike away from the campsite by myself. Sentence2: I got lost because I did not have any equipment on me. Sentence3: I walked for miles searching for my friends. Sentence4: Eventually I found some trail markers.

SOLUTION:
1, I went on a hiking trip this summer.