Which World Rank happened in 1977?
CREATE TABLE table_name_81 (world_rank VARCHAR, year VARCHAR)
SELECT world_rank FROM table_name_81 WHERE year = 1977
### Context: CREATE TABLE table_name_81 (world_rank VARCHAR, year VARCHAR) ### Question: Which World Rank happened in 1977? ### Answer: SELECT world_rank FROM table_name_81 WHERE year = 1977