12655
Spectra of two isomers of the weakly bound complex OCS - CO ( 2 ) are observed in the region of the CO ( 2 ) nu ( 3 ) fundamental vibration ( ~ 2349 cm ( - 1 ) ) , using an infrared tunable diode laser to probe a pulsed supersonic slit - jet expansion .
 Chemical: OCS; Chemical: CO ( 2 ); 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: OCS; Chemical: CO ( 2 ); Chemical: CO ( 2 )