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_44 (chassis VARCHAR, engine VARCHAR, year VARCHAR)
### Question:
What chassis did the porsche flat-4 use before 1958?
### Answer:
SELECT chassis FROM table_name_44 WHERE engine = "porsche flat-4" AND year < 1958