318823
Other possible names Besides , the head of seal was also called : Sometimes , in Chinese , the Niu is written as " 钮 " in simplifed Chinese ( with " 钅 " ) , and " 鈕 " in traditional Chinese ( with " 金 " ) , instead of using " 纽 " ( with " 纟 " ) or " 紐 " ( with " 糹 " ) , respectively , mainly because in very early period of time , governmental seals were mainly made of metals .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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