Is the fence different in color than the rock?
No, both the fence and the rock are black.
    src        edge_attr  dst
0     1           eating    0
1     1   to the left of    3
2     3               by    1
3     3  to the right of    8
4     3  to the right of    1
5     4   to the left of    5
6     4               by    1
7     5  to the right of    4
8     8   to the left of    3
9     8   to the left of    9
10    9  to the right of    8