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_48 (frequency___hz__ INTEGER, helmholtz_pitch VARCHAR)
  ### Question:
  What is the lowest Frequency where the Hemholtz pitch is d?
  ### Answer:
  SELECT MIN(frequency___hz__) FROM table_name_48 WHERE helmholtz_pitch = "d"