When did Yugoslavia play a friendly game in Belgrade?
CREATE TABLE table_name_88 (date VARCHAR, city VARCHAR, type_of_game VARCHAR)
SELECT date FROM table_name_88 WHERE city = "belgrade" AND type_of_game = "friendly"
### Context: CREATE TABLE table_name_88 (date VARCHAR, city VARCHAR, type_of_game VARCHAR) ### Question: When did Yugoslavia play a friendly game in Belgrade? ### Answer: SELECT date FROM table_name_88 WHERE city = "belgrade" AND type_of_game = "friendly"