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Furthermore , Rg1 showed a tendency to aggravate OIH in the acetic acid - induced writhing test .
 Chemical: Rg1; Disease: OIH; Chemical: acetic acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Rg1; Disease: OIH; Chemical: acetic acid