Complex sentence: Attilio Demaria (born March 19,1909 in Buenos Aires--died November 11,1990 in Haedo) was a football (soccer) player, who played for Argentina in the 1930 World Cup, but for Italy in the 1934 World Cup.
Split into simpler sentences: Attilio Demaria (born March 19,1909 in Buenos Aires) is a former football (soccer) player. Demaria played for Argentina in the 1930 World Cup, but for Italy in the 1934 World Cup.