instruction:
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.
question:
Sentence: Silicon and germanium react with nitrogen at high temperature to form nitrides. Question: Silicon and germanium react with nitrogen at high temperature to form what?
answer:
nitrides


question:
Sentence: Air weakly scatters visible light. Question: What weakly scatters visible light?
answer:
air


question:
Sentence: Unburned hydrocarbons can more easily be converted to carbon dioxide and water in the presence of a catalyst. Question: Unburned hydrocarbons can more easily be converted to carbon dioxide and water in the presence of a what?
answer:

catalyst