157
In both sediment types , oxygen radical absorbance capacity ( ORAC ) and antioxidant enzyme activities [ superoxide dismutase ( SOD ) and catalase ( CAT ) ] increased during hypoxia , suggesting that M . affinis has a strategy of preparation for oxidative stress that facilitates recovery after a hypoxic episode .
 Chemical: oxygen; 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: superoxide