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: The boys had been watching birds all month. Sentence2: Finally they decided to build a bird house. Sentence3: They collected some wood, nails, and a couple hammers. Sentence4: Then they got straight to work and fit it all together.

SOLUTION: Finally they hung it and stood back to admire their project.

PROBLEM: Sentence1: My favorite animal is the Arabian Oryx. Sentence2: I can't usually see them because it's an African antelope. Sentence3: I have to go to zoos. Sentence4: My family bought me a nice present for my birthday this year.

SOLUTION: They gave me a big illustrated book on African animals.

PROBLEM: Sentence1: I was looking for a nice painting for my living room. Sentence2: Hence yesterday I went out looking. Sentence3: I finally found a beautiful one I loved. Sentence4: The painting was of a waterfall.

SOLUTION:
I purchased it and brought it home.