CREATE TABLE table_56284 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Original air date" CLOB, "Production code" CLOB)

What is the average of the Series #s that were directed by Matthew Penn?
SELECT AVG("Series #") FROM table_56284 WHERE "Directed by" = 'matthew penn'
SELECT AVG("Series #") FROM "table_56284" WHERE "Directed by" = 'matthew penn'