How many clubs were founded in the westfalenstadion stadium?
CREATE TABLE table_26218124_1 (founded VARCHAR, stadium VARCHAR)
SELECT COUNT(founded) FROM table_26218124_1 WHERE stadium = "Westfalenstadion"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_26218124_1 (founded VARCHAR, stadium VARCHAR) Question: How many clubs were founded in the westfalenstadion stadium? [/INST] SELECT COUNT(founded) FROM table_26218124_1 WHERE stadium = "Westfalenstadion" </s>