CREATE TABLE table_name_11 (tie_no INT, home_team VARCHAR)

what is the average tie no when the home team is stamford a.f.c.?
SELECT AVG(tie_no) FROM table_name_11 WHERE home_team = "stamford a.f.c."
SELECT AVG("tie_no") FROM "table_name_11" WHERE "home_team" = "stamford a.f.c."