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_47 (entrant VARCHAR, engine VARCHAR)
### Question:
Which Entrant has a vanwall straight-4 engine?
### Answer:
SELECT entrant FROM table_name_47 WHERE engine = "vanwall straight-4"