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: Keith wanted to be a photographer. Sentence2: He started applying to every photo magazine he could. Sentence3: He never got a response back. Sentence4: Suddenly, out of nowhere, National Geo wanted to hire him.

SOLUTION: He was so excited.

PROBLEM: Sentence1: Ken left his house in a rush one morning. Sentence2: He heard his door creak as he slammed it shut. Sentence3: This bothered Ken a lot. Sentence4: When he got home he took out a can of oil.

SOLUTION: Ken oiled the door hinge so it didn't make any noise.

PROBLEM: Sentence1: Jay and Bella loved fish tanks. Sentence2: They had everything they needed for a new tank except for some plants. Sentence3: They set the tank up and ordered some plants from a web site. Sentence4: It took 2 weeks for the plants to arrive.

SOLUTION:
They bought some fish.