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
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_81 (world_rank VARCHAR, year VARCHAR) Question: Which World Rank happened in 1977? [/INST] SELECT world_rank FROM table_name_81 WHERE year = 1977 </s>