CREATE TABLE table_27107 ("Episode Number" FLOAT, "Location" TEXT, "Original Airdate" TEXT, "Challenge Winner" TEXT, "Challenge" TEXT)

How many dates originally aired episodes located in Philadelphia, pennsylvania?
SELECT COUNT("Original Airdate") FROM table_27107 WHERE "Location" = 'Philadelphia, Pennsylvania'
SELECT COUNT("Original Airdate") FROM "table_27107" WHERE "Location" = 'Philadelphia, Pennsylvania'