Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_17 (constructor VARCHAR, circuit VARCHAR, date VARCHAR)
### Question:
What company constrcuted the vehicle with a circuit of oulton park on 15 april?
### Answer:
SELECT constructor FROM table_name_17 WHERE circuit = "oulton park" AND date = "15 april"