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.
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Question: Sentence: A colony refers to a group of individual organisms of the same species that live closely together. Question: What refers to a group of individual organisms of the same species that live closely together?

Answer: a colony


Question: 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?

Answer: elemental iron


Question: Sentence: Frequency of a electromagnetic wave can be calculated using the wave equation due to their speed always being constant. Question: What of a electromagnetic wave can be calculated using the wave equation due to their speed always being constant?

Answer:
frequency