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

Tornadoes can occur in any.
At what time of the year can tornadoes occur?

Hydras and sea anemones are examples of apolyp.
Hydras and sea anemones are examples of what form?

Vinegar is an example of carboxylic type of acid.

Vinegar is an example of what type of acid?