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_15 (system VARCHAR, actual_version VARCHAR)
### Question:
Which System has an Actual Version 9.0?
### Answer:
SELECT system FROM table_name_15 WHERE actual_version = "9.0"