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Delta 9 - tetrahydrocannabinol impairs the inflammatory response to influenza infection : role of antigen - presenting cells and the cannabinoid receptors 1 and 2 .
 Chemical: Delta 9 - tetrahydrocannabinol
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: Delta 9 - tetrahydrocannabinol