What is in front of the leafless tree?
The fire hydrant is in front of the tree.
    src        edge_attr  dst
0     0           behind    4
1     0   to the left of    1
2     0   to the left of    2
3     0   to the left of   12
4     0   to the left of   13
..  ...              ...  ...
81   17  to the right of   15
82   17  to the right of    0
83   17  to the right of   13
84   17  to the right of   14
85   17  to the right of   12

[86 rows x 3 columns]