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Geiger spent three field seasons in the Arctic as historical investigator for the Knight Archeological Project , a scientific investigation of the 1719 James Knight Expedition disaster , research published as Dead Silence in 1993 .
 person: Geiger; person: Knight; person: James Knight
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: Geiger, Knight, James Knight 
Answer:
 person: Geiger; person: Knight; person: James Knight