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_65 (quantity VARCHAR, model VARCHAR)
### Question:
What is the Quantity of the engine Model PG-2901?
### Answer:
SELECT quantity FROM table_name_65 WHERE model = "pg-2901"