12170
Then , the individual response to O ( 2 ) as well as changing needs of O ( 2 ) during sleep or exercise must be evaluated to provide the best O ( 2 ) therapy .
 Chemical: O ( 2 ); Chemical: O ( 2 ); Chemical: O ( 2 )
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 ( 2 ); Chemical: O ( 2 ); Chemical: O ( 2 )