CREATE TABLE table_name_86 (rank___number_ VARCHAR2, air_date VARCHAR2)

What is the rank for the show aired on May 19, 2009?
SELECT rank___number_ FROM table_name_86 WHERE air_date = "may 19, 2009"
SELECT "rank___number_" FROM "table_name_86" WHERE "air_date" = "may 19, 2009"