What is common to the backpack and the sign?
The color, both the backpack and the sign are black.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    6
2     1  to the right of    4
3     1  to the right of    2
4     1  to the right of    7
..  ...              ...  ...
64   20   to the left of    5
65   20   to the left of   10
66   21   to the left of    6
67   21   to the left of   10
68   22   to the left of   10

[69 rows x 3 columns]