Where does the parentheses go in this sentence

it is important as you should know to turn off your cell phone at the doctors office

It is important (as you should know) to turn off your cell phone at the doctors office.

Explanation:

Brackets (parentheses) are punctuation marks used within a sentence to include information that is not essential to the main point. Information within parentheses is usually supplementary; were it removed, the meaning of the sentence would remain unchanged. We can easily remove the phrase, "as you should know", and the sentence would still make sense.

an unbound book has no cover; paris is a single man

explanation:

it provides a unique and personal perspective on a significant historical event.