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

There are three quarks in each proton and neutron.
How many quarks are in each proton and neutron?

A clade is one way of classifying organisms.

What is one way of classifying organisms called?