What's the series number of the episode whose writer is David North?
CREATE TABLE table_22078972_2 (no_in_series INTEGER, written_by VARCHAR)
SELECT MAX(no_in_series) FROM table_22078972_2 WHERE written_by = "David North"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_22078972_2 (no_in_series INTEGER, written_by VARCHAR) Question: What's the series number of the episode whose writer is David North? [/INST] SELECT MAX(no_in_series) FROM table_22078972_2 WHERE written_by = "David North" </s>