What is the graffiti on?
The graffiti is on the wall.
     src        edge_attr  dst
0      0  to the right of   16
1      0  to the right of    6
2      0  to the right of   21
3      0  to the right of   18
4      0  to the right of    7
..   ...              ...  ...
120   21  to the right of   11
121   21  to the right of   12
122   22   to the left of   14
123   22   to the left of   20
124   22   to the left of   15

[125 rows x 3 columns]