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_8 (lane INTEGER, nationality VARCHAR, rank VARCHAR)
### Question:
for the rank of 3 for the united states, what is the average lane?
### Answer:
SELECT AVG(lane) FROM table_name_8 WHERE nationality = "united states" AND rank = 3