CREATE TABLE table_1638 ("Country" TEXT, "Amateur Era" FLOAT, "Open Era" FLOAT, "All-time" FLOAT, "First title" FLOAT, "Last title" FLOAT)

How many open era titles does the team with their first title in 1925 have?
SELECT "Open Era" FROM table_1638 WHERE "First title" = '1925'
SELECT "Open Era" FROM "table_1638" WHERE "First title" = '1925'