79998
The potential for sensitive dependence on initial conditions ( the butterfly effect ) has been studied in a number of cases in semiclassical and quantum physics including atoms in strong fields and the anisotropic Kepler problem .
 person: Kepler
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: Kepler 
Answer:
 person: Kepler