CREATE TABLE table_66681 ("Date ( s )  Released" CLOB, "Polling institute" CLOB, "Nationalist" CLOB, "Labour" CLOB, "Democratic Alternative" CLOB, "Undecided/ No answer" CLOB, "Lead" CLOB)

Which polling institute showed a lead of 12% and a Labour share of the poll at 40.2%?
SELECT "Polling institute" FROM table_66681 WHERE "Lead" = '12%' AND "Labour" = '40.2%'
SELECT "Polling institute" FROM "table_66681" WHERE "Labour" = '40.2%' AND "Lead" = '12%'