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_23915973_1 (frequency VARCHAR, callsign VARCHAR)
  ### Question:
  What is the frequency when callsign is dxru-fm?
  ### Answer:
  SELECT frequency FROM table_23915973_1 WHERE callsign = "DXRU-FM"