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Analogously , applying the same technique at lambda = 3 . 3 mu m , the Mid - IR sensor is able to determine the concentration of toluene dissolved in carbon tetrachloride , because toluene has a strong absorption at lambda = 3 . 3 mu m from the aromatic C - H stretch .
 Chemical: toluene; Chemical: carbon tetrachloride; Chemical: toluene; Chemical: C - H
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: toluene; Chemical: carbon tetrachloride; Chemical: toluene; Chemical: C - H