Hans Bertil Ljungberg (born 26 March 1948) is a retired Swedish swimmer who won a bronze medal at the 1970 European Aquatics Championships. He competed at the 1968 and 1972 Summer Olympics in eight freestyle medley and backstroke events; his best achievement was the fourth place in the 4200 m freestyle relay in 1972.In the 1960s he studied at the California State University Long Beach. In the 2000s he was still competing in the masters category. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Athlete