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 man with a shaved head and a button-up shirt looks into a microscope near a poster about red blood cells. Sentence 2: A scientist studies a vaccine.

SOLUTION: A man without hair near a poster about red blood cells is looking through a microscope.

PROBLEM: Sentence 1: A woman is stirring the contents of a cooking pot. Sentence 2: A woman is stirring a soup she is cooking.

SOLUTION: A woman is cooking.

PROBLEM: Sentence 1: A dad is entertaining his family by playing the guitar. Sentence 2: The dad plays country music under the starry night.

SOLUTION:
There is a man playing an instrument.