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:
| Team | Home city | Home ground | In Toppserien since | First appearance | Seasons |
| --- | --- | --- | --- | --- | --- |
| Amazon Grimstad | Grimstad | JJ Ugland Stadion | 2006.0 | 2006.0 | 8.0 |
| Arna-Bjørnar | Ytre Arna (Bergen) | Arna Idrettspark | 2006.0 | 1997.0 | 16.0 |
| Avaldsnes | Avaldsnes | Avaldsnes Idrettssenter | 2013.0 | 2013.0 | 1.0 |
| Klepp | Kleppe (Stavanger) | Klepp Stadion | 1987.0 | 1987.0 | 27.0 |
| Kolbotn | Kolbotn (Oslo) | Sofiemyr | 1995.0 | 1995.0 | 19.0 |
| LSK Kvinner | Lillestrøm (Oslo) | LSK-Hallen | 1987.0 | 1987.0 | 27.0 |
| Medkila | Harstad | Harstad Stadion | 2013.0 | 2004.0 | 3.0 |
| Røa | Oslo | Røabanen | 2001.0 | 2001.0 | 13.0 |
| Sandviken | Bergen | Stemmemyren | 2011.0 | 1987.0 | 21.0 |
| Stabæk | Bærum (Oslo) | Nadderud Stadion | 2009.0 | 2009.0 | 5.0 |
| Trondheims-Ørn | Trondheim | DnB Nor Arena | 1987.0 | 1987.0 | 27.0 |
Question:
What is the home city for the team whose home ground is dnb nor arena? 
Answer:
Trondheim