When did the season with 1 team format premiere?
CREATE TABLE table_1949994_7 (premiere_air_dates VARCHAR, format VARCHAR)
SELECT premiere_air_dates FROM table_1949994_7 WHERE format = "1 Team"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1949994_7 (premiere_air_dates VARCHAR, format VARCHAR) Question: When did the season with 1 team format premiere? [/INST] SELECT premiere_air_dates FROM table_1949994_7 WHERE format = "1 Team" </s>