Quick Chicago Question

I was viewing 'Broadway: The American Musical' last night, and heard someone say (forget who) that Chicago had two revivals. To my understanding and Chicago knowledge (which I thought was pretty good), there has only been the one revival starting with Bebe and Ann. Was there another one or were they counting the London production as well or something along those lines? I = confused. Help!

Thanks Margo. I thought there was the only one revival, but that comment threw me.

I was thinking that as well. Not sure what they were talking about though.