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:
Virtually all aquatic organisms depend directly or indirectly on protists for food.

Ex Output:
Virtually all aquatic organisms depend directly or indirectly on what for food?


Ex Input:
The liver has three main components: hepatocytes, bile canaliculi, and this?

Ex Output:

The liver has three main components: hepatocytes, bile canaliculi, and this?