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At the 1976 Summer Olympics he won the Olympic gold medal together with Ingvar Hansson before second placed Valentin Mankin and Vladislav Akimenko and bronze medalists Dennis Conner and Colin Findlay .
 Ingvar Hansson, Valentin Mankin, Dennis Conner
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ingvar Hansson, Valentin Mankin, Dennis Conner