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

[Q]: Rubber is an example of a(n) insulators that does not allow electrons to move through them.
[A]: Rubber is an example of what type of substances that do not allow electrons to move through them?


[Q]: Seedless and seed are the two divisions of vascular plants.
[A]: What are the two divisions of vascular plants?


[Q]: Nonbinding of repressor protein lactose is present in the cell, what allows the lac genes to be expressed.
[A]:
When lactose is present in the cell, what allows the lac genes to be expressed?