CREATE TABLE table_27041 ("\\u2116" FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

How many original air dates for the episode written by David H. Goodman & Andrew Kreisberg?
SELECT COUNT("Original air date") FROM table_27041 WHERE "Written by" = 'David H. Goodman & Andrew Kreisberg'
SELECT COUNT("Original air date") FROM "table_27041" WHERE "Written by" = 'David H. Goodman & Andrew Kreisberg'