A fact from Norman, Is That You? appeared on Wikipedia's Main Page in the Did you know column on 15 April 2009 (check views). The text of the entry was as follows:
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I removed the line "Norman, Is That You? is notably the first play to have an entirely open and comedic treatment of the topic of homosexuality." since the source seems to only point to the Google Books copy of the play.
Looking at the copy of the play on archive.org[1], it doesn't seem to mention this claim. It also seems like a difficult claim to prove given the long history of global theater.
