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 little white and brown dog runs through brown grass. Sentence 2: A big black dog is catching a bone.

SOLUTION: A dog is outside.

PROBLEM: Sentence 1: Small children in uniforms standing in the grass. Sentence 2: Adults dressed in different colors are standing on concrete.

SOLUTION: Kids are outside.

PROBLEM: Sentence 1: A dog's speed is measured by a man while the dog runs. Sentence 2: A man runs while a dog measures his speed.

SOLUTION:
An animal runs while a man calculates its speed.