30551
This value is a dimensionless quantity formed by the ratio of two energies : the electrostatic energy of attraction ( or repulsion ) at a separation of one Compton wavelength , and the rest energy of the charge .
 person: Compton
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Compton 
Answer:
 person: Compton