CREATE TABLE table_2214 ("Poll source" CLOB, "Dates administered" CLOB, "Tom Emmer  ( R ) " CLOB, "Matt Entenza  ( DFL ) " CLOB, "Tom Horner  ( I ) " CLOB, "Undecided" CLOB, "Sampling error" CLOB)

What's the percentage of undecided according to the poll source with sampling error of 2.7%?
SELECT "Undecided" FROM table_2214 WHERE "Sampling error" = '2.7%'
SELECT "Undecided" FROM "table_2214" WHERE "Sampling error" = '2.7%'