In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Example Input: Question: What is the name of the location in which a stream or river starts? Answer: source
Example Output: Source is the name of the location in which a stream or river starts.

Example Input: Question: What is the most common life form in the ocean? Answer: plankton
Example Output: Plankton is the most common life form in the ocean.

Example Input: Question: Why are atoms of metals good conductors of electricity? Answer: give up electrons
Example Output:
Atoms of metals are good conductors of electricity because they give up electrons.