Complex sentence: It was designed for Eaton's by John Graham, Jr. as an enclosed mall with a department store anchor and subterranean parking which opened in downtown London, Ontario, on August 11,1960.
Split into simpler sentences: It was designed for Eaton's by John Graham Jr. as an enclosed mall with a department store anchor and subterranean parking. It opened in downtown London, Ontario, on August 11,1960.