When was the aircraft introduced that could seat 115 people?
CREATE TABLE table_name_30 (introduced INTEGER, seating VARCHAR)
SELECT AVG(introduced) FROM table_name_30 WHERE seating = "115"
### Context: CREATE TABLE table_name_30 (introduced INTEGER, seating VARCHAR) ### Question: When was the aircraft introduced that could seat 115 people? ### Answer: SELECT AVG(introduced) FROM table_name_30 WHERE seating = "115"