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: George was at the hotel last night. Sentence2: He needed ice for his drinks. Sentence3: The room he was in was all out. Sentence4: He had to go out to the ice machine to get more.

SOLUTION: Luckily there was plenty left there for him.

PROBLEM: Sentence1: Lucy was sleeping in her bed in the middle of the night. Sentence2: Suddenly she heard a loud crashing noise and jumped up. Sentence3: She looked outside wondering what the sound was. Sentence4: It had started storming and she heard loud thunder.

SOLUTION: Lucy was relieved and went back to sleep.

PROBLEM: Sentence1: I can always tell when the mail truck is coming. Sentence2: The mail truck makes a loud squeaking sound when it stops. Sentence3: I heard that sound today, so I went outside. Sentence4: The sound was made by a package delivery truck.

SOLUTION:
The driver gave me a package that I hadn't expected.