What is the tournament that had Grand Slam Tournaments in 1976?
CREATE TABLE table_name_13 (tournament VARCHAR)
SELECT tournament FROM table_name_13 WHERE 1976 = "grand slam tournaments"
### Context: CREATE TABLE table_name_13 (tournament VARCHAR) ### Question: What is the tournament that had Grand Slam Tournaments in 1976? ### Answer: SELECT tournament FROM table_name_13 WHERE 1976 = "grand slam tournaments"