CREATE TABLE table_31993 ("Name" CLOB, "Circuit" CLOB, "Date" CLOB, "Winning driver" CLOB, "Winning constructor" CLOB, "Report" CLOB)

Name the circuit for marcel lehoux
SELECT "Circuit" FROM table_31993 WHERE "Winning driver" = 'marcel lehoux'
SELECT "Circuit" FROM "table_31993" WHERE "Winning driver" = 'marcel lehoux'