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_17814458_1 (slope_length VARCHAR, elevation_groundstation VARCHAR)
  ### Question:
  Name the slope length for 1966 groundstation
  ### Answer:
  SELECT COUNT(slope_length) FROM table_17814458_1 WHERE elevation_groundstation = 1966