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.

Input: Consider Input: Sentence: Hydrogen gas is generated by the reaction of nitric acid and elemental iron else. Question: Hydrogen gas is generated by the reaction of nitric acid and what else?

Output: elemental iron

Input: Consider Input: Sentence: Competive exclusion princple explains why two different species cannot occupy the same niche in the same place for very long. Question: What explains why two different species cannot occupy the same niche in the same place for very long?

Output: competive exclusion princple

Input: Consider Input: Sentence: Rounding is when one or more ending digits are dropped to get the correct number of significant figures. Question: What is it called when one or more ending digits are dropped to get the correct number of significant figures?
Output: rounding