What' the series number of the episode with season number 13?
CREATE TABLE table_2226817_6 (no_in_series INTEGER, no_in_season VARCHAR)
SELECT MIN(no_in_series) FROM table_2226817_6 WHERE no_in_season = 13
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2226817_6 (no_in_series INTEGER, no_in_season VARCHAR) Question: What' the series number of the episode with season number 13? [/INST] SELECT MIN(no_in_series) FROM table_2226817_6 WHERE no_in_season = 13 </s>