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:
| Name | No. Specimens | Abbr. | Country | City |
| --- | --- | --- | --- | --- |
| Estonian University of Life Sciences | 336000.0 | TAA | Estonia | Tartu |
| University of Tartu | 324000.0 | TU | Estonia | Tartu |
| Vilnius University | 300000.0 | WI | Lithuania | Vilnius |
| University of Latvia , Riga | 176000.0 | RIG | Latvia | Riga |
| University of Latvia , Salaspils | 175000.0 | LATV | Latvia | Salaspils |
| Institute of Botany, Lithuania | 130000.0 | BILAS | Lithuania | Vilnius |
| Estonian Museum of Natural History | 100000.0 | TAM | Estonia | Tallinn |
| Tallinn Botanic Garden | 85000.0 | TALL | Estonia | Tallinn |
| National Botanic Garden of Latvia | 50000.0 | HBA | Latvia | Salaspils |
Question:
What is the abbreviation for the University of Tartu?
Answer:
TU