<|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|>Who directed all the episodes that were written by aaron ehasz & john o'bryan?

SQL Table Create Statement:
CREATE TABLE table_14562722_1 (directed_by VARCHAR, written_by VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT directed_by FROM table_14562722_1 WHERE written_by = "Aaron Ehasz & John O'Bryan"</codeend><|end|>