TASK DEFINITION: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
PROBLEM: Sentence1: My family wanted a pet. Sentence2: We went to the pet store on Saturday. Sentence3: We saw lots of dogs and kittens. Sentence4: We fell in love with a cute black kitten.

SOLUTION: We bought the kitten.

PROBLEM: Sentence1: Bob wanted a parrot. Sentence2: His parents decided to get him one. Sentence3: Bob realized that a parrot was hard work. Sentence4: He decided to sell the parrot.

SOLUTION: His parents got angry and grounded him for being irresponsible.

PROBLEM: Sentence1: I was listening to some music. Sentence2: Suddenly, my headphones stopped working. Sentence3: I tried to fix them but it was no use. Sentence4: I had to go to the shop to buy new headphones.

SOLUTION:
I bought some headphones and could listen to my music once more!