CREATE TABLE table_51641 ("Year" FLOAT, "Franchise" TEXT, "League" TEXT, "Percentage" FLOAT, "Finish" TEXT)

In the Year 1939, what was the Finish when Al was the League?
SELECT "Finish" FROM table_51641 WHERE "League" = 'al' AND "Year" = '1939'
SELECT "Finish" FROM "table_51641" WHERE "League" = 'al' AND "Year" = '1939'