24874
The half - maximal effective concentration values were 0 . 34ng / ml for TPA , 0 . 050mg / ml for the 2R4F , 0 . 044mg / ml for the Bright cigarette , and 0 . 060mg / ml for the Burley cigarette .
 Chemical: TPA
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: TPA