What aircraft was introduced in 2004 and has a retired of —?
CREATE TABLE table_name_83 (aircraft VARCHAR, retired VARCHAR, introduced VARCHAR)
SELECT aircraft FROM table_name_83 WHERE retired = "—" AND introduced = 2004
### Context: CREATE TABLE table_name_83 (aircraft VARCHAR, retired VARCHAR, introduced VARCHAR) ### Question: What aircraft was introduced in 2004 and has a retired of —? ### Answer: SELECT aircraft FROM table_name_83 WHERE retired = "—" AND introduced = 2004