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 table_name_21 (measurement VARCHAR, estimated_function__percentage INTEGER)
  ### Question:
  What is the measurement where the estimated function % is less than 20?
  ### Answer:
  SELECT measurement FROM table_name_21 WHERE estimated_function__percentage < 20