23793
The total atmospheric lifetimes of the Br - containing methanes due to both reaction with OH and photolysis were calculated to be 22 , 50 , and 67 days for CHBr3 , CHClBr2 , and CHCl2Br , respectively .
 Chemical: Br; Chemical: methanes; Chemical: OH; Chemical: CHBr3; Chemical: CHClBr2; Chemical: CHCl2Br
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: Br; Chemical: methanes; Chemical: OH; Chemical: CHBr3; Chemical: CHClBr2; Chemical: CHCl2Br