5943
Meanwhile , abnormal ECG types were monitored in rats exposed to PM ( 2 . 5 ) with and without ozone and obvious myocardial ultrastructural changes were observed by TEM .
 Chemical: ozone
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