TASK DEFINITION: In this task, you're given a pair of sentences, sentence 1 and sentence 2, that contradict each other. Your job is to alter sentence 2 so that the pair agree with 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 snowboarder in green is balancing on a wodden bench. Sentence 2: A skier is skiing.

SOLUTION: A snowboarder is on a bench.

PROBLEM: Sentence 1: A man in a red and white striped shirt walking past a wall with a painting of a man with a brown hat and surrounded by pink paint. Sentence 2: A man is asleep against a wall.

SOLUTION: A man is walking by a wall with a mural on it.

PROBLEM: Sentence 1: Two water polo players wrestle for the ball while a goal keeper watches in front of a goal with an Angry Birds advertisement on the back of the net. Sentence 2: There is no goalkeeper in the waterpolo match.

SOLUTION:
There is an Angry Birds ad at the water polo game.