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

Ex Input:
When the phosphorus element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air

Ex Output:
When what element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air?


Ex Input:
Phospholipids are vesicles made of.

Ex Output:
What are vesicles made of?


Ex Input:
Microfilaments thickens the cortex around the inner edge of a cell.

Ex Output:

What thickens the cortex around the inner edge of a cell?