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Pavel Štěpánek , of Prague , Czechoslovakia , became , during the 1960s , the most tested individual participant in parapsychology experiments , both in terms of number of trials , and number of independent investigators .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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