What year had an edition of 115th?
CREATE TABLE table_name_21 (year INTEGER, edition VARCHAR)
SELECT AVG(year) FROM table_name_21 WHERE edition = "115th"
### Context: CREATE TABLE table_name_21 (year INTEGER, edition VARCHAR) ### Question: What year had an edition of 115th? ### Answer: SELECT AVG(year) FROM table_name_21 WHERE edition = "115th"