Which SECR numbers have a class of b1?
CREATE TABLE table_name_36 (secr_numbers VARCHAR, class VARCHAR)
SELECT secr_numbers FROM table_name_36 WHERE class = "b1"
### Context: CREATE TABLE table_name_36 (secr_numbers VARCHAR, class VARCHAR) ### Question: Which SECR numbers have a class of b1? ### Answer: SELECT secr_numbers FROM table_name_36 WHERE class = "b1"