Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Blood is made up of red blood cells, white blood cells, platelets, and plasma.

Answer: Blood is made up of red blood cells, white blood cells, platelets, and what else?


Question: 10 million years long can a large star be on the main sequence stage.

Answer: How long can a large star be on the main sequence stage?


Question: The vascular structure functions as a framework that reinforces the shape of the leaf.

Answer:
What functions as a framework that reinforces the shape of the leaf?