| http://www.w3.org/ns/prov#value | - ??? ??? ??? Basins Generally flat regions surrounded by mountains or other higher land. ??? ??? ??? Canopy The uppermost layer of a tropical rain forests' trees where limbs are spread out and blouck out sunlight. ??? ??? ??? Copper Belt A major copper-mining region of Central Africa. ??? ??? ??? Periodic Markets Open-air trading markets in Central Africa. ??? ??? ??? Ivory A cream-colored material
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