Is the large train to the right or to the left of the ladder?
The train is to the left of the ladder.
    src        edge_attr  dst
0     0   to the left of   10
1     1   to the left of   10
2     2   to the left of   10
3     2   to the left of   11
4     3   to the left of   10
5     4   to the left of   10
6     5   to the left of    8
7     6           behind   16
8     7  to the right of    9
9     8  to the right of    5
10    9   to the left of    7
11   10  to the right of    1
12   10  to the right of    2
13   10  to the right of    3
14   10  to the right of    4
15   10  to the right of    0
16   10  to the right of   16
17   10  to the right of   14
18   10  to the right of   13
19   10  to the right of   11
20   11   to the left of   10
21   11  to the right of   14
22   11  to the right of    2
23   11  to the right of   15
24   13   to the left of   10
25   14   to the left of   11
26   14  to the right of   15
27   14   to the left of   10
28   15   to the left of   11
29   15   to the left of   14
30   16      in front of    6
31   16   to the left of   10