4143
Iron is an essential nutrient , but elevated concentrations of FeCl3 are corrosive as a result of hydrolysis to HCl .
 Chemical: Iron; Chemical: FeCl3; Chemical: HCl
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: Iron, FeCl3, HCl 
Answer:
 Chemical: Iron; Chemical: FeCl3; Chemical: HCl