TASK DEFINITION: In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 stoplight is yellow next to a pedestrian crossing sign. Sentence 2: Someone is waiting to cross the street

SOLUTION: The stoplight will turn red shortly

PROBLEM: Sentence 1: These people are doing dangerous things. Sentence 2: These people are doing illegal things.

SOLUTION: People doing dangerous things

PROBLEM: Sentence 1: A child with a dirty face looks at the camera and smiles. Sentence 2: A dirty-faced child smiles after playing in the sandbox.

SOLUTION:
A dirty child is smiling.