Is the lake green?
Yes, the lake is green.
    src        edge_attr  dst
0     0            above   12
1     0  to the right of    5
2     0   to the left of    1
3     1  to the right of    0
4     1   on the back of    7
5     2            above   12
6     2   to the left of   11
7     5   to the left of    0
8     5   to the left of    7
9     7  to the right of    5
10    8  to the right of   10
11   10  to the right of   13
12   10   to the left of    8
13   11  to the right of    2
14   13   to the left of   10