Which color is that fire hydrant, dark or green?
The fire hydrant is dark.
    src        edge_attr  dst
0     0  to the right of   14
1     0   to the left of    3
2     0   to the left of   11
3     2   to the left of   13
4     3   to the left of    5
5     3  to the right of    0
6     3   to the left of    6
7     3   to the left of   10
8     3   to the left of    8
9     4   to the left of   10
10    5   to the left of    8
11    5   to the left of   10
12    5  to the right of    3
13    5  to the right of    6
14    6   to the left of   10
15    6   to the left of    8
16    6   to the left of    5
17    6  to the right of    3
18    7  to the right of    9
19    8  to the right of    6
20    8  to the right of    5
21    8  to the right of    3
22    9   to the left of    7
23    9  to the right of   13
24   10  to the right of    5
25   10  to the right of    3
26   10  to the right of    4
27   10  to the right of    6
28   11  to the right of    0
29   11  to the right of   14
30   12  to the right of   14
31   13   to the left of    9
32   13   to the left of   15
33   13  to the right of    2
34   14   to the left of    0
35   14   to the left of   12
36   14   to the left of   11
37   15  to the right of   13