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			Top of the CONA Hierarchy
			.... Built Works (CONA facet)
			........ <B> (8)

			............ Built Works by class: landscape architecture, spaces, agricultural, and animal husbandry structures
			................ London Zoo
			.................... Casson Pavilion
			.................... Clock Tower
			.................... East Tunnel
			.................... Giraffe House
			.................... Penguin Pool
			.................... Ravens' Cage
			.................... Round House
			.................... Snowdon Aviary

........ <U> (1)