3393
In the case of open-shell atoms with degenerate energy levels , one could define a dipole moment by the aid of the first-order Stark effect .
 person: Stark
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: Stark 
Answer:
 person: Stark