23404
After three weeks , rats from each group were given a single ip injection of corn oil ( control ) , 1 , or 5 mu mol / kg body weight PCB126 .
 Chemical: PCB126
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: PCB126 
Answer:
 Chemical: PCB126