CREATE TABLE table_71381 ("Polling Firm" CLOB, "Date" CLOB, "Link" CLOB, "PSOE" CLOB, "Others" CLOB, "Lead" CLOB)

Which date has a PSOE of 36.1%?
SELECT "Date" FROM table_71381 WHERE "PSOE" = '36.1%'
SELECT "Date" FROM "table_71381" WHERE "PSOE" = '36.1%'