instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Seedless and seed are the two divisions of vascular plants.
answer:
What are the two divisions of vascular plants?


question:
The properties of the alkali metals are similar to each other as expected for elements in the same family.
answer:
The properties of the alkali metals are similar to each other as expected for elements in the same what?


question:
Bases are antacids comprised of.
answer:

What are antacids comprised of?