Are there either fences or helmets?
No, there are no helmets or fences.
     src        edge_attr  dst
0      0  to the right of   34
1      0  to the right of   31
2      0  to the right of    8
3      0  to the right of   15
4      1  to the right of   12
..   ...              ...  ...
287   33  to the right of   34
288   34   to the left of   33
289   34   to the left of   31
290   34   to the left of    0
291   34   to the left of   15

[292 rows x 3 columns]