What is the rank for the episode that premiered on September 13, 1978?
CREATE TABLE table_name_21 (rank VARCHAR, premiere VARCHAR)
SELECT rank FROM table_name_21 WHERE premiere = "september 13, 1978"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_21 (rank VARCHAR, premiere VARCHAR) Question: What is the rank for the episode that premiered on September 13, 1978? [/INST] SELECT rank FROM table_name_21 WHERE premiere = "september 13, 1978" </s>