What animals are drinking?
The animals are elephants.
    src        edge_attr  dst
0     1  to the right of    6
1     3        on top of    5
2     3      in front of    5
3     3               in    9
4     3        on top of    9
5     3   to the left of   10
6     3  to the right of    8
7     4  to the right of    6
8     5           behind    3
9     6   to the left of    4
10    6   to the left of    1
11    8   to the left of    3
12    8          next to    9
13    8  to the right of   11
14    8             near    9
15    9             near    8
16   10  to the right of    3
17   11   to the left of    8