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

Ex Input:
Simple carbohydrates can be classified in terms of chain length.

Ex Output:
Which carbohydrates can be classified in terms of chain length?


Ex Input:
Seedless and seed are the two divisions of vascular plants.

Ex Output:
What are the two divisions of vascular plants?


Ex Input:
Eight valence electrons do most of the noble gas elements have in common.

Ex Output:

What do most of the noble gas elements have in common?