what is the average silver when the total is more than 20?
CREATE TABLE table_name_66 (silver INTEGER, total INTEGER)
SELECT AVG(silver) FROM table_name_66 WHERE total > 20
### Context: CREATE TABLE table_name_66 (silver INTEGER, total INTEGER) ### Question: what is the average silver when the total is more than 20? ### Answer: SELECT AVG(silver) FROM table_name_66 WHERE total > 20