9105
Zucker obese rats have a reduction in the concentration of Cu , Zn , Fe , Mg in the liver compared to ZDF and / or lean Zucker rats , presumably as a result of the increased fat content of the liver of the obese rats .
 Chemical: Cu; Chemical: Zn; Chemical: Fe; Chemical: Mg
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: Cu, Zn, Fe, Mg 
Answer:
 Chemical: Cu; Chemical: Zn; Chemical: Fe; Chemical: Mg