17624
We exposed A549 cells in vitro to aldehydes and non - aldehyde chemicals ( nicotine , hydroquinone and 2 , 5 - dimethylfuran ) present in tobacco smoke and used microarrays to obtain a global view of the transcriptomic responses .
 Chemical: aldehydes; Chemical: aldehyde; Chemical: nicotine; Chemical: hydroquinone; Chemical: 2 , 5 - dimethylfuran
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: aldehydes, aldehyde, nicotine, hydroquinone, 2 , 5 - dimethylfuran 
Answer:
 Chemical: aldehydes; Chemical: aldehyde; Chemical: nicotine; Chemical: hydroquinone; Chemical: 2 , 5 - dimethylfuran