Gore ra-1997 (sho: Chiuru chemazanamapfumbamwe nemakumimapfumbamwe-nenomwe) raive gore rinjee rakatanga musi weChitatu muKarenda ya Gregori. Raive gore rechiuru nemazanamapfumbamwe-nenomwe reZera riNjee[C 1] (ZN) uye Ano Dhomini (AD) dzemishariro[C 2], gore remazanamapfumbamwe-nenomwe muWurukati rechiPiri uye gore rechimakumimapfumbamwe-nenomwe muZanagore re Makumimaviri, ne gore rechisere mugumikati reMa1990.
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