What is on the wall?
The graffiti is on the wall.
    src        edge_attr  dst
0     0               on    1
1     1   to the left of    7
2     1  to the right of   12
3     2  to the right of   12
4     2   to the left of    9
5     3  to the right of    6
6     3  to the right of    4
7     4   to the left of    3
8     4  to the right of   10
9     4   to the left of    6
10    5               on    2
11    6  to the right of    4
12    6   to the left of    3
13    7  to the right of    1
14    7     connected to    8
15    7   to the left of    9
16    8   to the left of    9
17    9  to the right of    2
18    9  to the right of    7
19    9  to the right of    8
20   10   to the left of    4
21   12   to the left of    1
22   12   to the left of    2