12656
Two bands are measured and analyzed for each isomer , the fundamental asymmetric stretch of the CO ( 2 ) component and a combination band involving this fundamental plus the intermolecular out - of - plane torsional mode .
 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 )