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