CREATE TABLE table_42800 ("Office" TEXT, "Democratic ticket" TEXT, "Republican ticket" TEXT, "Prohibition ticket" TEXT, "Greenback ticket" TEXT)

Which office was Richard M. Griffin vying for on the Greenback ticket?
SELECT "Office" FROM table_42800 WHERE "Greenback ticket" = 'richard m. griffin'
SELECT "Office" FROM "table_42800" WHERE "Greenback ticket" = 'richard m. griffin'