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We address these hypotheses by initially examining the exposure effects of ozone ( O ( 3 ) ) and / or particulate matter ( PM ) on cardiac function in C57Bl / 6J ( B6 ) mice .
 Chemical: ozone; Chemical: O ( 3 )
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: ozone; Chemical: O ( 3 )