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The plum pudding model with a single electron was used in part by the physicist Arthur Erich Haas in 1910 to estimate the numerical value of Planck 's constant and the Bohr radius of hydrogen atoms .
 person: Arthur Erich Haas; person: Planck; person: Bohr
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: Arthur Erich Haas, Planck, Bohr 
Answer:
 person: Arthur Erich Haas; person: Planck; person: Bohr