<prompt> Kamilisha sentensi ifuatayo: Yepez alikuwa sehemu ya ujumbe wa Ecuador katika mashindano kadhaa ya kimataifa na mashindano: 16 Olympiad Chess ya Tel Aviv 1964,  <response>: 17 Chess Olympiad ya Havana 1966, 18 Chess Olympiad ya Lugano 1968, Open Tournament ya Nice - 1974 Capitan, Panamerican Tournament ya Havana, 1968, II Tournament Apertura - Bogotá, 1970, Tournament Ecopetrol - El Tiempo - Bogotá, 1970, VIII Caribbean na Amerika ya Kati Zone Tournament FIDE, Bogotá 1972. 