Is the blue vehicle to the left or to the right of the bag on the left?
The train is to the right of the bag.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    1
2     1   to the left of    5
3     1   to the left of    0
4     2  to the right of    0
5     3   to the left of    5
6     4   to the left of    5
7     5               by    6
8     5  to the right of    4
9     5  to the right of    1
10    5  to the right of    3
11    6               by    5