Where is the lamp?
The lamp is on the sand.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    3
2     3  to the right of    0
3     3   to the left of    7
4     3  to the right of    8
5     7  to the right of    0
6     7  to the right of    8
7     7  to the right of    3
8     8               on    6
9     8   to the left of    7
10    8   to the left of   10
11    8   to the left of    3
12   10  to the right of    8
13   14               on    9