23126
Finally , we observed that i . c . v . pretreatment with antiserum against beta - endorphin also suppressed the increased blood urea and plasma creatinine .
 Chemical: urea; Chemical: creatinine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: urea, creatinine 
Answer:
 Chemical: urea; Chemical: creatinine