CREATE TABLE Documents (document_name VARCHAR(255), template_id VARCHAR(255)); CREATE TABLE Templates (template_id VARCHAR(255), template_type_code VARCHAR(255))
Show all document names using templates with template type code BK.
    
SQL: SELECT T2.document_name FROM Templates AS T1 JOIN Documents AS T2 ON T1.template_id = T2.template_id WHERE T1.template_type_code = "BK"