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 man who's head and face is covered is walking with a rather large weapon on his shoulder. Sentence 2: The man is smiling.

SOLUTION: a person walks in a mask carrying something

PROBLEM: Sentence 1: One woman delivers a lecture with a powerpoint to a large group of woman, with predominantly black hair. Sentence 2: One woman doesn't deliver a lecture

SOLUTION: One woman delivers a lecture

PROBLEM: Sentence 1: One guy having a hard time trying to stay on a horse during a competition. Sentence 2: Currently, there is no one riding a horse.

SOLUTION:
There is difficult staying on a horse.