CREATE TABLE table_73391 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

Name the date successor seated for contested election; served until february 14, 1794
SELECT "Date successor seated" FROM table_73391 WHERE "Reason for change" = 'Contested election; served until February 14, 1794'
SELECT "Date successor seated" FROM "table_73391" WHERE "Reason for change" = 'Contested election; served until February 14, 1794'