When did Avi be a librarian?!

Question: When did Avi be a librarian!?

Im trying to do a time line about him for school!.Www@Enter-QA@Com

Answers:

Please close the door on the way out from this section!. It′s J′s & R′s not History!.Www@Enter-QA@Com

is this a joke or a riddle!?!?Www@Enter-QA@Com

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