Which kind of animal is it?
The animal is an elephant.
    src        edge_attr  dst
0     0   to the left of   12
1     2   to the left of   11
2     3  to the right of   13
3     4               in    5
4     4   to the left of   12
5     6   to the left of   10
6     6  to the right of   13
7     6   to the left of   12
8     9   to the left of   10
9    10  to the right of    6
10   10  to the right of    9
11   11  to the right of    2
12   12  to the right of    0
13   12  to the right of    4
14   12  to the right of    6
15   13   to the left of   14
16   13   to the left of    6
17   13   to the left of    3
18   14  to the right of   13