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As a prominent rocket scientist , he is a veteran of six space flights and ranks third to Gennady Padalka and Yuri Malenchenko for the amount of time in space : a total of 803 days , 9 hours , and 39 minutes .
 person: Gennady Padalka; person: Yuri Malenchenko
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Gennady Padalka; person: Yuri Malenchenko