12120
In this study , supercritical fluid extraction ( SFE ) with CO ( 2 ) and hydrodistillation ( HD ) were compared as methods to isolate the essential oil from Cupressus sempervirens .
 Chemical: CO ( 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: CO ( 2 )