CREATE TABLE table_12991 ("Nat." CLOB, "Name" CLOB, "Moving from" CLOB, "Type" CLOB, "Transfer window" CLOB, "Ends" CLOB)

What is the transfer window for the moving from of S o Paulo?
SELECT "Transfer window" FROM table_12991 WHERE "Moving from" = 'são paulo'
SELECT "Transfer window" FROM "table_12991" WHERE "Moving from" = 'são paulo'