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 determines the color of visible light? Answer: exact wavelength
Example Output: Exact wavelength determines the color of visible light.

Example Input: Question: What do you call the hard case that surrounds the soft parts of some animals? Answer: exoskeleton
Example Output: You call the hard case that surrounds the soft parts of some animals the exoskeleton.

Example Input: Question: In aquatic communities, the main producers are photosynthetic protists and what? Answer: prokaryotes
Example Output:
In aquatic communities, the main producers are photosynthetic protists and prokaryotes.