This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

There was already regulation on public drinking spaces in the 17th and 18th centuries,[citation needed] and the income earned from licences was beneficial to the crown. Tavern owners were required to possess a licence to sell ale, and a separate licence for distilled spirits.
In addition to a license to sell spirits, what did tavern owners require a license to sell?