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_40 (conference_joined VARCHAR, year_joined VARCHAR, mascot VARCHAR)
### Question:
Which conference joined in 1954 with a beavers mascot?
### Answer:
SELECT conference_joined FROM table_name_40 WHERE year_joined = 1954 AND mascot = "beavers"