instruction:
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.
question:
Sentence1: The delivery man handed a package to me. Sentence2: I opened the box. Sentence3: He couldn't hear me and drove off. Sentence4: I had to call to find out what was going on.
answer:
3, Since nothing was inside, I tried shouting at the delivery man.

question:
Sentence1: Mario got up out of bed. Sentence2: Today was his wedding day and he already felt the butterflies. Sentence3: He got dressed and went to the church. Sentence4: It was the best day of his life.
answer:
3, He shaved and showered happily.

question:
Sentence1: Sam wanted to be a singer. Sentence2: So he joined a singing class at his college. Sentence3: The first day of class, everyone was required to sing a song. Sentence4: Sam was very embarrassed the first day.
answer:
5, All his classmates were very supportive though.