23957
Systemic administration of 1 reduced acetic acid - induced writhing , the inflammatory phase of formalin - induced pain , and capsaicin - induced mechanical allodynia .
 Chemical: acetic acid; Chemical: formalin; Chemical: capsaicin
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; Chemical: capsaicin