text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE teaches (name VARCHAR, id VARCHAR); CREATE TABLE instructor (name VARCHAR, id VARCHAR)
  ### Question:
  Find the name of instructors who didn't teach any courses?
  ### Answer:
  SELECT name FROM instructor WHERE NOT id IN (SELECT id FROM teaches)