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The results indicated that the amount of alpha - pinene in the brain and liver was twofold greater after mixed - component inhalation than that after single - component inhalation .
 Chemical: alpha - pinene
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: alpha - pinene