CREATE TABLE table_204_37 (id DECIMAL, "#" DECIMAL, "wrestlers" TEXT, "reign" DECIMAL, "date" TEXT, "days\ held" DECIMAL, "location" TEXT, "event" TEXT, "notes" TEXT)

tell me the date of the last event held in greensboro , north carolina .
SELECT "date" FROM table_204_37 WHERE "location" = 'greensboro, north carolina' ORDER BY "date" DESC LIMIT 1
SELECT "date" FROM "table_204_37" WHERE "location" = 'greensboro, north carolina' ORDER BY "date" DESC NULLS LAST LIMIT 1