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_28 (lane VARCHAR, nationality VARCHAR, name VARCHAR)
### Question:
How many lanes have a Nationality of united states, and a Name of aaron peirsol?
### Answer:
SELECT COUNT(lane) FROM table_name_28 WHERE nationality = "united states" AND name = "aaron peirsol"