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 skier skiing down a large mountain Sentence 2: A person ice skating on a frozen lake.

SOLUTION: A skier is skiing.

PROBLEM: Sentence 1: Dark-haired man singing into a microphone and playing a guitar outside. Sentence 2: A man is juggling knives on stage.

SOLUTION: A man is performing.

PROBLEM: Sentence 1: a yellow dog swimming in the water with something red in his mouth Sentence 2: A dog runs through the park chasing ducks.

SOLUTION:
A dog swims through the water.