<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>Find the number of concerts happened in the stadium with the highest capacity .

SQL Table Create Statement:
CREATE TABLE concert (stadium_id VARCHAR, capacity VARCHAR); CREATE TABLE stadium (stadium_id VARCHAR, capacity VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT COUNT(*) FROM concert WHERE stadium_id = (SELECT stadium_id FROM stadium ORDER BY capacity DESC LIMIT 1)</codeend><|end|>