SELECT AVG("Episode #") FROM table_75833 WHERE "Share" = '7' AND "18\u201349" < '2' AND "Air Date" = 'may 21, 2009'
What is the average Episode # with a 7 share and 18 49 is less than 2 and the Air Date of may 21, 2009?
CREATE TABLE table_75833 (
    "Episode #" real,
    "Title" text,
    "Air Date" text,
    "Rating" real,
    "Share" real,
    "18\u201349" real,
    "Viewers" real,
    "Rank" text
)