What do the post and the sign have in common?
The color, both the post and the sign are white.
     src        edge_attr  dst
0      0            above    9
1      2   to the left of   16
2      2   to the left of   17
3      2  to the right of   18
4      2  to the right of   20
..   ...              ...  ...
113   23  to the right of   24
114   24   to the left of   23
115   24  to the right of   21
116   24  to the right of   18
117   24  to the right of    8

[118 rows x 3 columns]