Question: Who played on December 25, 1925?
SQL: SELECT "Competition" FROM "2-15387087-4" WHERE "Date" = 'December 25, 1925';

Question: What was the score for the South American Championship dated December 13, 1925?
SQL: SELECT "Result" FROM "2-15387087-4" WHERE "Competition" = 'South American Championship' AND "Date" = 'December 13, 1925';