Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: Antibodies recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms.
[A]: Which proteins recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms?


[Q]: Mercury is the name of the smallest planet in our solar system, which is also nearest to the sun.
[A]: What is the name of the smallest planet in our solar system, which is also nearest to the sun?


[Q]: Ribosomes are the only organelles that prokaryotic cells have.
[A]:
What are the only organelles that prokaryotic cells have?