CREATE TABLE table_685 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Results" TEXT, "Candidates" TEXT)

In which district is the incumbent Marcia C. Kaptur?
SELECT "District" FROM table_685 WHERE "Incumbent" = 'Marcia C. Kaptur'
SELECT "District" FROM "table_685" WHERE "Incumbent" = 'Marcia C. Kaptur'