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: Two lines of colorful cars racing on a racetrack. Sentence 2: Some brightly colored cars are going extremely fast on a track.

SOLUTION: Some cars are racing

PROBLEM: Sentence 1: Man driving a red Coca-Cola truck by palm trees. Sentence 2: The man is making a delivery.

SOLUTION: Someone is driving a vehicle.

PROBLEM: Sentence 1: Five people are racing each other with go-karts. Sentence 2: Five friends are racing go-karts to find out who is the best driver.

SOLUTION:
Five people are having a go-kart race.