What is on the wall?
The monitor is on the wall.
     src        edge_attr  dst
0      0  to the right of   15
1      0  to the right of   14
2      0  to the right of   23
3      0  to the right of   22
4      0   to the left of    2
..   ...              ...  ...
110   23   to the left of    8
111   23           behind   17
112   23   to the left of    0
113   23   to the left of   11
114   23   to the left of    1

[115 rows x 3 columns]