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_1 (quantity INTEGER, class_from_1928 VARCHAR)
### Question:
What's the sum of Quantity for the Class of 1928 of CI-30?
### Answer:
SELECT SUM(quantity) FROM table_name_1 WHERE class_from_1928 = "ci-30"