Information: - Chess is a two-player strategy board game played on a chessboard, a checkered gameboard with 64squares arranged in an eight-by-eight grid. Chess is played by millions of people worldwide, both amateurs and professionals. - Julio Argentino Kaplan Pera (born 25 July 1950, Argentina) is a Puerto Rican chess player, former world junior champion and software developer founder of Heuristic Software. - Amikam Balshan ( born 3 May 1948 ) , is an Israeli chess master , who won the Israeli youth championship in 1965 . In 1967 , he played in the World Junior Chess Championship in Jerusalem , as Julio Kaplan won . Balshan represented Israel six times in World Student Team Chess Championships ( 1968 -- 1972 , 1974 ) winning the individual gold medal on fourth board , scoring 10/11 , at Ybbs 1968 . He played for Israel in the 20th Chess Olympiad at Skopje 1972 , and won the individual silver medal at first reserve board ( +10 -- 0 = 6 ) there . He also represented Israel in the 7th European Team Chess Championship at Skara 1980 . In 1978/79 , he took 15th in Hastings ( Ulf Andersson won ) . He tied for 1st - 2nd with Jacob Murey at Ramat Hasharon 1979 , and shared 17th at Gausdal 1982 ( Maxim Dlugy won ) . Given the information, choose the subject and object entities that have the relation of 'occupation'.
A:
amikam balshan , chess player