4511
The mean values of the concentrations of the components due to tobacco smoke are : CO = 1 . 1 ppm , NO = 32 ppb , NO2 = 24 ppb , nicotine = 0 . 9 micrograms / m3 , particulate matter = 133 micrograms / m3 .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None