6980
To clarify the mode of action of GnIH on the synthesis of gonadotropin releasing hormone ( GnRH ) and gonadotrophin ( GtH ) , three GnIHR cDNAs were cloned from the goldfish brain .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None