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_33 (date VARCHAR, opposition VARCHAR, round VARCHAR)
### Question:
When was the opposition sydney fc on round 19?
### Answer:
SELECT date FROM table_name_33 WHERE opposition = "sydney fc" AND round = "round 19"