Is the motorcycle to the right or to the left of the person on the left?
The motorcycle is to the right of the man.
    src        edge_attr  dst
0     1   to the left of   15
1     1  to the right of   13
2     1   to the left of    3
3     3  to the right of    1
4     3   to the left of   15
5     3  to the right of   13
6     5               on   12
7     6  to the right of   14
8     7  to the right of   14
9    11  to the right of   14
10   13   to the left of    3
11   13   to the left of    1
12   13   to the left of   15
13   14   to the left of    6
14   14   to the left of    7
15   14   to the left of   11
16   15  to the right of   13
17   15  to the right of    1
18   15  to the right of    3