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_57 (number VARCHAR, position VARCHAR, hometown VARCHAR)
### Question:
What is the number with the f position in Dallas, Texas?
### Answer:
SELECT COUNT(number) FROM table_name_57 WHERE position = "f" AND hometown = "dallas, texas"