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_15139 ( "Name" text, "Circuit" text, "Date" text, "Winning driver" text, "Winning constructor" text, "Report" text )

### Question ###
Who was the winning driver of the Savio Circuit with the constructor Itala?

### Accurate SQL ###

SELECT "Winning driver" FROM table_15139 WHERE "Winning constructor" = 'itala' AND "Name" = 'savio circuit'