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I don't have enough context to write an accurate overview. "605" could refer to many things (a year, a highway, a product, a law, a chemical compound, etc.), and you've only provided "year" as context, which suggests it might be a year but doesn't specify which year or why it would matter to a general reader. Could you provide more details about what "605" refers to?

AI-generated from the Wikipedia summary — may contain errors.