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 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 white dog is running with an orange fence behind him. Sentence 2: A white dog is running outside.

SOLUTION: A white dog is sitting on the porch.

PROBLEM: Sentence 1: A person walking with a black umbrella walking in front of an iron fence. Sentence 2: Someone with an umbrella passing by a fence.

SOLUTION: A group of tourists with umbrella's peering through the picket fence.

PROBLEM: Sentence 1: The large brown dog is sitting on the path next to a tree. Sentence 2: The dog is enjoying the outdoors.

SOLUTION:
The dog is biting someone as they try to run away.