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For example , in modeling group behavior in which heterogeneous members may behave as if sharing to different degrees what in Wilfred Bion 's theory is a basic assumption , researchers have found that the group dynamic is the result of the individual dynamics of the members : each individual reproduces the group dynamics in a different scale , and the chaotic behavior of the group is reflected in each member .
 person: Wilfred Bion
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Wilfred Bion 
Answer:
 person: Wilfred Bion