Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Aircraft | Introduced | Retired | Seating | Notes |
| --- | --- | --- | --- | --- |
| Airbus A319-100 | 2004.0 | — | 156 | In service |
| Airbus A320-200 | 2008.0 | — | 180 | In service |
| Airbus A321-200 | 2008.0 | 2010 | 220 | Inherited from GB Airways |
| Boeing 737-204 | 1995.0 | 1996 | 115 | Replaced by 737-300s |
| Boeing 737-300 | 1996.0 | 2007 | 148/9 | Replaced by A319s |
| Boeing 737-700 | 2000.0 | 2011 | 149 | Replaced by A319s and A320s |
Question:
What aircraft was introduced in 2004 and has a retired of —?
Answer:
Airbus A319-100