CREATE TABLE table_78681 ("Year" FLOAT, "Date" TEXT, "Home Team" TEXT, "Result" TEXT, "Visiting Team" TEXT, "Venue" TEXT)

What Date after 2007 had the San Francisco 49ers as the Visiting Team?
SELECT "Date" FROM table_78681 WHERE "Visiting Team" = 'san francisco 49ers' AND "Year" > '2007'
SELECT "Date" FROM "table_78681" WHERE "Visiting Team" = 'san francisco 49ers' AND "Year" > '2007'