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After a talk of Friedrich Oskar Giesel – a pioneer in the research and production of radium – he obtained a sample of radium from Giesel to determine magnetic properties of the new element .
 person: Friedrich Oskar Giesel; person: Giesel
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: Friedrich Oskar Giesel, Giesel 
Answer:
 person: Friedrich Oskar Giesel; person: Giesel