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:
| Position | Pilot | Glider | Speed | Distance |
| --- | --- | --- | --- | --- |
| 1.0 | Mario Kiessling | Ventus 2ax | 128.8km/h | 240.5km |
| 2.0 | Uli Schwenk | Ventus 2ax | 128.1km/h | 240.5km |
| 3.0 | Carlos Rocca Vidal | Ventus 2b | 127.6km/h | 240.5km |
| 4.0 | Sebastian Kawa | Diana 2 | 127.1km/h | 240.5km |
| 5.0 | Thomas Gostner | Diana 2 | 126.3km/h | 240.5km |
| 6.0 | Graham Parker | ASG 29 | 125.7km/h | 240.5km |
| 7.0 | Tilo Holighaus | Ventus 2ax | 125.3km/h | 240.5km |
| 8.0 | Wolfgang Janowitsch | Ventus 2cax | 124.2km/h | 240.5km |
| 9.0 | Heimo Demmerer | Ventus 2b | 124.1km/h | 240.5km |
| 10.0 | Eduard Supersperger | Ventus 2b | 124.0km/h | 240.5km |
| 10.0 | Stanislaw Wujczak | ASG 29 | 123.9km/h | 240.5km |
| 10.0 | Petr Krejcirik | Ventus 2ax | 121.4km/h | 240.5km |
| 10.0 | Rene Vidal | Ventus 2c | 117.1km/h | 240.5km |
| 10.0 | Patrick Puskeiler | Discus 2ax | 111.1km/h | 240.5km |
| 10.0 | Olli Teronen | ASG 29 | 95km/h | 240.5km |
Question:
What glider did thomas gostner pilot?
Answer:
Diana 2