CREATE TABLE table_31478 ("Round" FLOAT, "Circuit" TEXT, "Date" TEXT, "Length" TEXT, "Pole Position" TEXT, "GT3 Winner" TEXT, "GT4 Winner" TEXT)

When charles bateman michael lyons is the gt3 winner and 9 is the round who is the gt4 winner?
SELECT "GT4 Winner" FROM table_31478 WHERE "Round" = '9' AND "GT3 Winner" = 'Charles Bateman Michael Lyons'
SELECT "GT4 Winner" FROM "table_31478" WHERE "GT3 Winner" = 'Charles Bateman Michael Lyons' AND "Round" = '9'