Assertion: coin | /r/HasProperty | superseded by cash coins
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Source sentences:
text: Until 1180 the Northern Song dynasty produced "matched cash coins" (對錢, duì qián) which were cash coins with identical inscriptions written in different styles of Chinese calligraphy, after these coins were superseded by cash coins that included the year of production on their reverse sides the practice of casting cash coins with "flower holes" also seems to have drastically decreased.