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The research on ideology , politics , and racist prejudice , by John Duckitt and Chris Sibley , identified two types of authoritarian worldview : ( i ) that the social world is dangerous , which leads to right-wing authoritarianism ; and ( ii ) that the world is a ruthlessly competitive jungle , which leads to social dominance orientation .
 person: John Duckitt; person: Chris Sibley
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: John Duckitt, Chris Sibley 
Answer:
 person: John Duckitt; person: Chris Sibley