Question: What was the score when Nacional was the champion, River Plate was the runner-up, and the venue was Centenario?
SQL: SELECT "Score" FROM "2-18141438-1" WHERE "Champion" = 'Nacional' AND "Venue" = 'Centenario' AND "Runner-up" = 'River Plate';

Question: Who was the champion when Atlético Wanderers was the runner-up?
SQL: SELECT "Champion" FROM "2-18141438-1" WHERE "Runner-up" = 'Atlético Wanderers';

Question: In which city is the San Lorenzo Centenario venue located?
SQL: SELECT "City" FROM "2-18141438-1" WHERE "Venue" = 'San Lorenzo Centenario';