4714
Pre - incubation of neutrophils with superoxide dismutase , but not with catalase , showed both a significant protective effect on the L - selectin down - regulation induced by several NSAIDs and a diminished effect of diclofenac on neutrophil rolling .
 Chemical: superoxide; Chemical: diclofenac
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: superoxide; Chemical: diclofenac