CREATE TABLE table_52879 ("Date ( s )  conducted" CLOB, "Cons" CLOB, "Plaid Cymru" CLOB, "Lib Dem" CLOB, "UKIP" CLOB, "Green" CLOB, "Others" CLOB, "Lead" CLOB)

On 5 May 2011, what was the lead percentage?
SELECT "Lead" FROM table_52879 WHERE "Date(s) conducted" = '5 may 2011'
SELECT "Lead" FROM "table_52879" WHERE "Date(s) conducted" = '5 may 2011'