Do you see any lamps?
Yes, there is a lamp.
    src        edge_attr  dst
0     0               in    4
1     0  to the right of    3
2     0  to the right of    9
3     1   to the left of   15
4     1               on   16
..  ...              ...  ...
60   15  to the right of    2
61   15  to the right of   10
62   15  to the right of   16
63   15   to the left of   13
64   16   to the left of   15

[65 rows x 3 columns]