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_1997759_1 (number VARCHAR, last_flew VARCHAR)
### Question:
on 19 april 1985 how many of number last flew
### Answer:
SELECT COUNT(number) FROM table_1997759_1 WHERE last_flew = "19 April 1985"