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Further , WOE also decreased the number of acetic acid - induced writhing responses and formalin - induced pain in the late phase in mice .
 Chemical: acetic acid; Chemical: formalin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: acetic acid; Chemical: formalin