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_16 (date VARCHAR, rocket VARCHAR, satellite VARCHAR)
### Question:
On what date was the rocket a TBD with a satellite of GPS IIIA-1?
### Answer:
SELECT date FROM table_name_16 WHERE rocket = "tbd" AND satellite = "gps iiia-1"