TASK DEFINITION: In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the end sentence choices from (A) and (B), such that the story does not sound complete and coherent, i.e., select an incorrect end sentence.
PROBLEM: Sentence1: Ben has always wanted to learn how to play piano. Sentence2: Now that his children are grown up, he has more spare time. Sentence3: Ben enrolls in a piano class with a local tutor. Sentence4: Although it is difficult, he is dedicated to learning.
(A) He gives up because it's too hard. (B) He gets better with every lesson.

SOLUTION: A

PROBLEM: Sentence1: Three little girls were standing by a pool at a party. Sentence2: One of the girls accidentally pushed the youngest girl into the pool. Sentence3: The little girl couldn't swim well and started to sink. Sentence4: Her dad noticed and came running out and pulled her out of the water.
(A) The little girl was saved by her dad. (B) The dad was then pulled out by the girl.

SOLUTION: B

PROBLEM: Sentence1: Leah had a beautiful Christmas tree in her house. Sentence2: One day, she left to go to the store. Sentence3: When she returned, the tree was knocked over. Sentence4: Her cat had climbed it and pulled it down!
(A) Leah decided she liked the tree on the floor better than standing. (B) Leah chastised her cat.

SOLUTION:
A