In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Primary pollutants enter the air directly. Question: What type of pollutants enter the air directly?
primary

Sentence: In budding , organisms reproduce by having new individuals split off from existing ones. Question: In budding , organisms reproduce by having new individuals split off from what?
existing ones

Sentence: Friction force is caused by microscopic bumps, lumps, and imperfections colliding. Question: What force is caused by microscopic bumps, lumps, and imperfections colliding?

friction