Question: Which building is on Madison Avenue, 9 DeKalb Avenue or Metropolitan Life Insurance Company Tower?
Sentence (from "9 DeKalb Avenue"): 9 DeKalb Avenue, alternatively referred to as 340 Flatbush Avenue Extension, is a supertall residential skyscraper under construction for Brooklyn, New York being developed by Michael Stern's JDS Development Group and Joseph Chetrit's Chetrit Group.
Relevant evidence: Yes