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_19 (position VARCHAR, bike_no VARCHAR)
### Question:
What is the aggregate number of Position that has a Bike No of 4?
### Answer:
SELECT COUNT(position) FROM table_name_19 WHERE bike_no = 4