What is the graffiti on?
The graffiti is on the wall.
    src        edge_attr  dst
0     0   to the left of   16
1     1            above   17
2     2   to the left of    6
3     3   to the left of    9
4     3   to the left of   18
..  ...              ...  ...
76   22   to the left of    6
77   22  to the right of   23
78   23   to the left of    6
79   23  to the right of   14
80   23   to the left of   22

[81 rows x 3 columns]