Is the train to the right or to the left of the man on the right?
The train is to the left of the man.
    src        edge_attr  dst
0     0   to the left of   12
1     2  to the right of    8
2     2  to the right of    3
3     2  to the right of    5
4     3  to the right of    5
5     3  to the right of    9
6     3   to the left of    2
7     4   to the left of    7
8     5   to the left of    2
9     5   to the left of    3
10    5   to the left of    6
11    6  to the right of    8
12    6  to the right of    5
13    7  to the right of   11
14    7  to the right of    4
15    8   to the left of    6
16    8   to the left of    2
17    9   to the left of    3
18   11   to the left of    7
19   12  to the right of    0