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These results suggest that cardiac functional changes in response to air pollution exposure are strongly dependent on the pollutant constituents , especially related to O ( 3 ) and / or PM .
 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: O ( 3 )