How many Antonov An-2 Colt aircraft are in service?
CREATE TABLE table_name_37 (in_service INTEGER, aircraft VARCHAR)
SELECT AVG(in_service) FROM table_name_37 WHERE aircraft = "antonov an-2 colt"
### Context: CREATE TABLE table_name_37 (in_service INTEGER, aircraft VARCHAR) ### Question: How many Antonov An-2 Colt aircraft are in service? ### Answer: SELECT AVG(in_service) FROM table_name_37 WHERE aircraft = "antonov an-2 colt"