CREATE TABLE table_57910 ("Year" FLOAT, "Title" TEXT, "Original channel" TEXT, "Role" TEXT, "Note" TEXT)

what is the year when the note is supporting and the title is rokumeikan?
SELECT "Year" FROM table_57910 WHERE "Note" = 'supporting' AND "Title" = 'rokumeikan'
SELECT "Year" FROM "table_57910" WHERE "Note" = 'supporting' AND "Title" = 'rokumeikan'