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_23 (points INTEGER, tyres VARCHAR, chassis VARCHAR)
  ### Question:
  Tell me the average points with tyres of b and chassis of tf109
  ### Answer:
  SELECT AVG(points) FROM table_name_23 WHERE tyres = "b" AND chassis = "tf109"