Question: What was the title character of a 90th birthday special participated in by Thelma Mae Harper made honorary mayor of?
Sentence (from "Betty White"): Regarded as a pioneer of television, she was one of the first women to have control both in front of and behind the camera; and is recognized as the first woman to produce a sitcom, which contributed to her receiving the honorary title "Mayor of Hollywood" in 1955.
Relevant evidence: Yes