8371
Compared with spectra recorded previously with IR photodissociation of Ar - tagged C ( 10 ) H ( 9 ) ( + ) or IR multiphoton dissociation of C ( 10 ) H ( 9 ) ( + ) , our method has the advantages of producing high - resolution IR spectra with a wide spectral coverage , true IR intensity and excellent ratio of signal to noise ; both protonated species and their neutral counterparts are produced with little interference from other fragments .
 Chemical: Ar; Chemical: C ( 10 ) H ( 9 ) ( + ); Chemical: C ( 10 ) H ( 9 ) ( + )
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: Ar; Chemical: C ( 10 ) H ( 9 ) ( + ); Chemical: C ( 10 ) H ( 9 ) ( + )