Are the animals elephants?
Yes, all the animals are elephants.
    src        edge_attr  dst
0     0  to the right of    6
1     0   to the left of   11
2     0  to the right of    7
3     2               in    9
4     3   to the left of   10
5     4   to the left of   11
6     6   to the left of    7
7     6   to the left of    0
8     7   to the left of    0
9     7  to the right of    6
10    7   to the left of   11
11   10  to the right of    3
12   11  to the right of    7
13   11  to the right of    0
14   11  to the right of    4