What is on the wall?
The graffiti is on the wall.
    src        edge_attr  dst
0     0               on   12
1     0   to the left of   10
2     2  to the right of    8
3     2   to the left of    3
4     3  to the right of    6
5     3  to the right of    2
6     3  to the right of   15
7     3  to the right of    8
8     4  to the right of    6
9     4   to the left of    5
10    5  to the right of    4
11    5  to the right of    6
12    5  to the right of   12
13    5  to the right of    8
14    5  to the right of   14
15    5   to the left of    9
16    6   to the left of    3
17    6   to the left of    4
18    6   to the left of    5
19    6   to the left of   13
20    6   to the left of   15
21    8   to the left of    2
22    8   to the left of    3
23    8   to the left of    5
24    8   to the left of   13
25    9  to the right of   13
26    9  to the right of    5
27   10  to the right of    0
28   12   to the left of   13
29   12   to the left of   14
30   12   to the left of    5
31   13  to the right of   14
32   13  to the right of    8
33   13  to the right of    6
34   13             near   15
35   13  to the right of   12
36   13   to the left of    9
37   14   to the left of    5
38   14   to the left of   13
39   14  to the right of   12
40   15   to the left of    3
41   15  to the right of    6
42   15          next to   13
43   15             near   13