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:
| AIRLINE | AIRLINE (in Arabic) | ICAO | CALLSIGN | COMMENCED OPERATIONS |
| --- | --- | --- | --- | --- |
| Karthago Airlines | قرطاج للطيران | KAJ | KARTHAGO | 2001.0 |
| Nouvelair | الطيران الجديد تونس | LBT | NOUVELAIR | 1989.0 |
| TunisAir Express | الخطوط التونسية السريعة | TUX | TUNEXPRESS | 1991.0 |
| Syphax Airlines | سيفاكس أيرلاينز | SYA | SYPHAXAIR | 2011.0 |
| Tunisair | الخطوط التونسية | TAR | TUNAIR | 1948.0 |
| Tunisavia | الشركة التونسية للنقل و الخدمات الجوية | TAJ | TUNISAVIA | 2010.0 |
Question:
What is the ICAO with commenced operations before 1989?
Answer:
TAR