CREATE TABLE table_66679 ("Date ( s )  Released" TEXT, "Polling institute" TEXT, "Nationalist" TEXT, "Labour" TEXT, "Democratic Alternative" TEXT, "Undecided/ No answer" TEXT, "Lead" TEXT)

What is the Nationalist share of the poll for the response in which Undecided/No Answer received 29.2%?
SELECT "Nationalist" FROM table_66679 WHERE "Undecided/ No answer" = '29.2%'
SELECT "Nationalist" FROM "table_66679" WHERE "Undecided/ No answer" = '29.2%'