CREATE TABLE table_70231 ("Year" FLOAT, "Date" TEXT, "Winner" TEXT, "Result" TEXT, "Loser" TEXT, "Location" TEXT)

What is the Date, when the Year is after 1978, and when the Location is Memorial Stadium (Baltimore)?
SELECT "Date" FROM table_70231 WHERE "Year" > '1978' AND "Location" = 'memorial stadium (baltimore)'
SELECT "Date" FROM "table_70231" WHERE "Location" = 'memorial stadium (baltimore)' AND "Year" > '1978'