What episode took place in Belfast Waterfront Hall?
CREATE TABLE table_23122988_1 (episode VARCHAR, location VARCHAR)
SELECT episode FROM table_23122988_1 WHERE location = "Belfast Waterfront Hall"
### Context: CREATE TABLE table_23122988_1 (episode VARCHAR, location VARCHAR) ### Question: What episode took place in Belfast Waterfront Hall? ### Answer: SELECT episode FROM table_23122988_1 WHERE location = "Belfast Waterfront Hall"