| http://www.w3.org/ns/prov#value | - However, no digital display apparatus that can display information (information using a contrast between brightness and darkness (light and shadow), e.g., information including at least one of a graphic, a symbol, a letter, a number, a leveling mark, and a mark that indicates width of the vehicle (hereinafter, ???a vehicle width mark???) on the road surface and the like using a reflection type dig
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