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_71 (places INTEGER, nation VARCHAR, rank VARCHAR)
### Question:
What is the Places amount of the United States Ranking 8?
### Answer:
SELECT AVG(places) FROM table_name_71 WHERE nation = "united states" AND rank = 8