CREATE TABLE table_name_9 (plaid_cymru VARCHAR2, date_s__conducted VARCHAR2)

I want the plaid cymru for 4 may 2011
SELECT plaid_cymru FROM table_name_9 WHERE date_s__conducted = "4 may 2011"
SELECT "plaid_cymru" FROM "table_name_9" WHERE "4 may 2011" = "date_s__conducted"