What is on the elephant?
The trunk is on the elephant.
    src        edge_attr  dst
0     0   to the left of    2
1     0   to the left of    1
2     1           behind    6
3     1  to the right of    5
4     1  to the right of    0
5     2   to the left of    3
6     2  to the right of    0
7     3  to the right of    2
8     3               on    6
9     4  to the right of    5
10    5   to the left of    4
11    5   to the left of    1
12    6      in front of    1