Is the elephant to the left or to the right of him?
The elephant is to the left of the boy.
    src        edge_attr  dst
0     0   to the left of   11
1     2               of    5
2     4  to the right of    5
3     5   to the left of    4
4     5   to the left of   11
5     6   to the left of    8
6     7               in    9
7     8   to the left of   11
8     8               of    5
9     8  to the right of    6
10   11  to the right of    0
11   11  to the right of    5
12   11          wearing   10
13   11  to the right of    8