What is the total number of Year(s), when Tournament is "World Championships"?
CREATE TABLE table_name_50 (year VARCHAR, tournament VARCHAR)
SELECT COUNT(year) FROM table_name_50 WHERE tournament = "world championships"
### Context: CREATE TABLE table_name_50 (year VARCHAR, tournament VARCHAR) ### Question: What is the total number of Year(s), when Tournament is "World Championships"? ### Answer: SELECT COUNT(year) FROM table_name_50 WHERE tournament = "world championships"