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_57 (launch_date_time__utc_ VARCHAR, payload VARCHAR)
### Question:
Tell me the launch date/time for payload of gsat-4
### Answer:
SELECT launch_date_time__utc_ FROM table_name_57 WHERE payload = "gsat-4"