CREATE TABLE table_33829 ("Season" CLOB, "Episodes" FLOAT, "First airdate" CLOB, "Last airdate" CLOB, "Nielsen ranking" CLOB)

What is the Nielsen ranking for Season 8?
SELECT "Nielsen ranking" FROM table_33829 WHERE "Season" = 'season 8'
SELECT "Nielsen ranking" FROM "table_33829" WHERE "Season" = 'season 8'