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_18933037_3 (b_52_model VARCHAR, unit VARCHAR)
### Question:
When 441st bs, 7th bw is the unit what is the b-52 model?
### Answer:
SELECT b_52_model FROM table_18933037_3 WHERE unit = "441st BS, 7th BW"