21689
The analysis is performed according to the three - capacitor model of the dipole potential of Langmuir monolayers ( Demchak , R . T . ; Fort , T . , Jr . J . Colloid Interface Sci . 1974 , 46 , 191 ) .
 None
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:  
Answer:
 None