What is a sentence for staff?
My dad has a staff.
A noun clause can function in a sentence as a noun; the subject of the sentence, and the object of a verb or a preposition. Subject: Whatever the cafeteria staff has decided to cook is on the menu board. Object of verb: The menu board tells whatever the cafeteria staff has decided to cook. Object of preposition: Check the menu board for whatever the cafeteria staff has decided to cook.
What is the requested verb in this sentence the journalism staff types the yearbook copy but another company print the book?
It is awkward. Better would be "How has your experience been with our staff?" or "How has your experience with our staff been?". Those questions would be likely to get you simple responses - Good, Bad, OK, etc. If you want a more detailed answer - try something like "Could you describe your experience with our staff?".