4188
CS exposure caused significant lung damage , as evidenced by higher levels of reactive oxygen species ( ROS ) , neutrophil infiltration , dityrosine and 4 - HNE , as well as lower levels of Mn - superoxide dismutase and catalase expression .
 Chemical: oxygen; Chemical: dityrosine; Chemical: 4 - HNE; Chemical: Mn; Chemical: superoxide
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: oxygen; Chemical: dityrosine; Chemical: 4 - HNE; Chemical: Mn; Chemical: superoxide