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_59 (purpose VARCHAR, freq_currently VARCHAR)
### Question:
What is the Purpose of the Callsign with a Freq currently of 4gld?
### Answer:
SELECT purpose FROM table_name_59 WHERE freq_currently = "4gld"