What does the fence surround?
The fence surrounds the parking lot.
     src        edge_attr  dst
0      0  to the right of   11
1      0   to the left of    3
2      0  to the right of   13
3      0   to the left of   25
4      0  to the right of   26
..   ...              ...  ...
214   38   to the left of   24
215   38  to the right of   36
216   38  to the right of   34
217   38   to the left of   10
218   38   to the left of   21

[219 rows x 3 columns]