<prompt> Pedzisa mutsara unotevera: Silvino García Martínez akaberekwa 4 Chikunguru 1944 mutambi weCuba wechess. Akapiwa zita reGrandmaster GM neFIDE muna 1975. García Martínez ndiye mukwikwidzi wenguva ina weCuba 1968, 1970, 1973, 1979. Akanga ariwo shasha yePan American muna 1968 uye akahwina menduru yebronze yomunhu oga paChess Olympiad mu  <response>: Muna 1978. 