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Carotid arteries , vena cava , and sympathetic ganglia from LNNA rats had higher basal levels of superoxide compared with those from control rats .
 Chemical: LNNA; Chemical: superoxide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: LNNA; Chemical: superoxide