CREATE TABLE table_23642 ("County" TEXT, "Obama %" TEXT, "Obama #" FLOAT, "McCain %" TEXT, "McCain #" FLOAT, "Others %" TEXT, "Others #" FLOAT)

What county had 915 third party voters?
SELECT "County" FROM table_23642 WHERE "Others #" = '915'
SELECT "County" FROM "table_23642" WHERE "Others #" = '915'