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_74 (built INTEGER, builder VARCHAR)
### Question:
Which Built has a Builder of brel crewe?
### Answer:
SELECT AVG(built) FROM table_name_74 WHERE builder = "brel crewe"