Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_31478 ( "Round" real, "Circuit" text, "Date" text, "Length" text, "Pole Position" text, "GT3 Winner" text, "GT4 Winner" text )

### Question ###
When charles bateman michael lyons is the gt3 winner and 9 is the round who is the gt4 winner?

### Accurate SQL ###

SELECT "GT4 Winner" FROM table_31478 WHERE "Round" = '9' AND "GT3 Winner" = 'Charles Bateman Michael Lyons'