14410
These parameters comprise ( i ) the local transition energies of the pigments in their binding sites in the protein , the site energies ; ( ii ) the couplings between optical transitions of the pigments , the excitonic couplings ; and ( iii ) the spectral density characterizing the dynamic modulation of pigment transition energies and excitonic couplings by protein vibrations .
 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