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Presidents Hernán Siles Zuazo ( 1982 – 85 ) and Víctor Paz Estenssoro ( 1985 – 89 ) began a tradition of ceding power peacefully which has continued , although two presidents have stepped down in the face of popular protests : Gonzalo Sánchez de Lozada in 2003 and Carlos Mesa in 2005 .
 person: Hernán Siles Zuazo; person: Víctor Paz Estenssoro; person: Gonzalo Sánchez de Lozada; person: Carlos Mesa
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: Hernán Siles Zuazo, Víctor Paz Estenssoro, Gonzalo Sánchez de Lozada, Carlos Mesa 
Answer:
 person: Hernán Siles Zuazo; person: Víctor Paz Estenssoro; person: Gonzalo Sánchez de Lozada; person: Carlos Mesa