Who is the constructor whose circuit was Oulton Park?
CREATE TABLE table_54651 (
    "Race Name" text,
    "Circuit" text,
    "Date" text,
    "Winning driver" text,
    "Constructor" text,
    "Report" text
)
SELECT "Constructor" FROM table_54651 WHERE "Circuit" = 'oulton park'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Who is the constructor whose circuit was Oulton Park? ### Input: CREATE TABLE table_54651 (
    "Race Name" text,
    "Circuit" text,
    "Date" text,
    "Winning driver" text,
    "Constructor" text,
    "Report" text
) ### Response: SELECT "Constructor" FROM table_54651 WHERE "Circuit" = 'oulton park'