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_1973816_2 (left VARCHAR, enrollment VARCHAR)
### Question:
In what year did the school with enrollment of 650 leave?
### Answer:
SELECT left FROM table_1973816_2 WHERE enrollment = 650