TASK DEFINITION: In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair neither agree nor contradict each other. Generated sentences must be short, with less than 15 words. New information can be introduced. Avoid using pronouns to confuse the subject of the sentence.
PROBLEM: Sentence 1: A man in a black shirt and black jeans and a little boy are taking a look inside a green truck's engine while it is parked in a grass field with a gas tank in front of it. Sentence 2: A man in black and a young boy are inspecting the engine of a green truck.

SOLUTION: A man and his son are trying to fix their truck.

PROBLEM: Sentence 1: A three piece male band is performing indoors. Sentence 2: A band performs.

SOLUTION: A private concert is held.

PROBLEM: Sentence 1: A male practices BMX bike riding at and man made urban practice field with big lumps of dirt, water and a factory as a back drop. Sentence 2: A person practicing

SOLUTION:
A man is practicing BMX for the X-Games.