SELECT "Winning constructor" FROM table_6339 WHERE "Winning driver" = 'felice nazzaro'
Which Winning constructor has a Winning driver of felice nazzaro?
CREATE TABLE table_6339 (
    "Name" text,
    "Circuit" text,
    "Date" text,
    "Winning driver" text,
    "Winning constructor" text,
    "Report" text
)