2745
Intradermal injection of mu , but not delta or kappa opioid - agonists , however , produced dose - dependent inhibition of prostaglandin E2 - induced hyperalgesia .
 Chemical: prostaglandin E2; Disease: hyperalgesia
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: prostaglandin E2; Disease: hyperalgesia