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_85 (capacity INTEGER, city VARCHAR, stadium VARCHAR)
### Question:
Which Capacity has a City of london, and a Stadium of queen's club?
### Answer:
SELECT AVG(capacity) FROM table_name_85 WHERE city = "london" AND stadium = "queen's club"