CREATE TABLE table_16599 ("No." FLOAT, "Episode" CLOB, "Air Date" CLOB, "Timeslot" CLOB, "Rating" CLOB, "Share" CLOB, "18\\u201349  ( Rating/Share ) " CLOB, "Viewers  ( m ) " CLOB, "Rank  ( # ) " CLOB)

What's the 18-49 (rating/share) of the episode that originally aired on May 5, 2009?
SELECT "18\u201349 (Rating/Share)" FROM table_16599 WHERE "Air Date" = 'May 5, 2009'
SELECT "18\u201349 (Rating/Share)" FROM "table_16599" WHERE "Air Date" = 'May 5, 2009'