Are there elephants or animals?
Yes, there is an elephant.
    src        edge_attr  dst
0     0   to the left of   10
1     1  to the right of   14
2     3               of    2
3     3  to the right of    7
4     3  to the right of    8
5     7   on the side of    6
6     7   to the left of    3
7     7   to the left of    8
8     7   to the left of   18
9     8  to the right of    7
10    8   to the left of    3
11    8               of    2
12   10   to the left of   12
13   10  to the right of    0
14   12  to the right of   10
15   13  to the right of   14
16   14   to the left of   13
17   14   to the left of    1
18   18  to the right of    7