I don't have specific context provided about the "21st century BC" to create an accurate overview. Could you please provide the context material you'd like me to base this on?
AI-generated from the Wikipedia summary — may contain errors.
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El siglo XXI a. C. comenzó el 1 de enero de 2100 a. C. y terminó el 31 de diciembre de 2001 a. C.
Abstract from DBpedia / Wikipedia · CC BY-SA
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).