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_81 (launched VARCHAR, territory VARCHAR, channel VARCHAR)
### Question:
When did channel 83 in singapore launch?
### Answer:
SELECT launched FROM table_name_81 WHERE territory = "singapore" AND channel = 83