Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE stadium (name VARCHAR, capacity INTEGER)

### Question ###
Find the names of stadiums whose capacity is smaller than the average capacity.

### Accurate SQL ###

SELECT name FROM stadium WHERE capacity < (SELECT AVG(capacity) FROM stadium)