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

Ex Input:
Carbon 14 isotope of carbon is typically used to date ancient items.

Ex Output:
What isotope of carbon is typically used to date ancient items?

Ex Input:
Axillary buds in the axils of leaves and stems give rise to branches.

Ex Output:
What in the axils of leaves and stems give rise to branches?

Ex Input:
The sun and many other light sources produce waves that are randomly this?

Ex Output:
The sun and many other light sources produce waves that are randomly this?