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Based on ephemerides produced by astronomer Giovanni Cassini and others , Pierre-Simon Laplace created a mathematical theory to explain the resonant orbits of three of Jupiter 's moons , Io , Europa , and Ganymede .
 person: Giovanni Cassini; person: Pierre-Simon Laplace
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: Giovanni Cassini, Pierre-Simon Laplace 
Answer:
 person: Giovanni Cassini; person: Pierre-Simon Laplace