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 stadium (name VARCHAR, id VARCHAR, stadium_id VARCHAR); CREATE TABLE event (name VARCHAR, id VARCHAR, stadium_id VARCHAR)
### Question:
Find the names of stadiums which have never had any event.
### Answer:
SELECT name FROM stadium WHERE NOT id IN (SELECT stadium_id FROM event)