CREATE TABLE table_28599 ("Year" FLOAT, "Under-11" TEXT, "Under-13" TEXT, "Under-15" TEXT, "Under-17" TEXT, "Under-19" TEXT)

When the under-17 was Antonio Glez, who was the under-13?
SELECT "Under-13" FROM table_28599 WHERE "Under-17" = 'Antonio Glez'
SELECT "Under-13" FROM "table_28599" WHERE "Under-17" = 'Antonio Glez'