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_4 (laps INTEGER, grid VARCHAR, manufacturer VARCHAR, time_retired VARCHAR)
  ### Question:
  What is the lowest laps that has a manufacturer of yamaha, and a time/retired of +1:08.312, and a grid less than 20?
  ### Answer:
  SELECT MIN(laps) FROM table_name_4 WHERE manufacturer = "yamaha" AND time_retired = "+1:08.312" AND grid < 20