10801
Cu , Zn - superoxide dismutase ( SOD ) is a key antioxidant enzyme that detoxifies intracellular reactive oxygen species , ROS , thereby protecting cells from oxidative damage .
 Chemical: Cu; Chemical: Zn; Chemical: superoxide; Chemical: oxygen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Cu; Chemical: Zn; Chemical: superoxide; Chemical: oxygen