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_11 (tie_no INTEGER, home_team VARCHAR)
### Question:
what is the average tie no when the home team is stamford a.f.c.?
### Answer:
SELECT AVG(tie_no) FROM table_name_11 WHERE home_team = "stamford a.f.c."