Are there men by the open train that is in front of the tree?
Yes, there is a man by the train.
    src        edge_attr  dst
0     0               by   20
1     0   to the left of   12
2     0   to the left of   18
3     0   to the left of   14
4     0   to the left of    4
..  ...              ...  ...
82   20   to the left of   12
83   20               by    8
84   20   to the left of   14
85   21  to the right of   16
86   21               by    8

[87 rows x 3 columns]