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:
| Pos. | City | Population\n(ab) | Surface\n(km²) | Density\n(ab/km²) | Altitude\n(mslm) |
| --- | --- | --- | --- | --- | --- |
| 1st | Bergamo | 121.316 | 39,6 | 3064 | 249 |
| 2nd | Treviglio | 29.334 | 31,54 | 930 | 125 |
| 3rd | Seriate | 25.036 | 12,41 | 2017 | 247 |
| 4th | Dalmine | 23.237 | 11,6 | 2003 | 207 |
| 5th | Romano di Lombardia | 19.472 | 18,03 | 1080 | 120 |
| 6th | Albino | 18.232 | 31,32 | 582 | 342 |
| 7th | Caravaggio | 16.258 | 32,81 | 496 | 111 |
| 8th | Alzano Lombardo | 13.821 | 13,43 | 1029 | 304 |
| 9th | Stezzano | 12.999 | 9,25 | 1405 | 211 |
| 10th | Osio Sotto | 12.083 | 7,45 | 1622 | 182 |
Question:
what city is the largest by surface area?
Answer:
Bergamo