On which side of the image is the child?
The child is on the right of the image.
    src        edge_attr  dst
0     0   to the left of   18
1     0   to the left of    8
2     0  to the right of   19
3     0  to the right of   14
4     0   to the left of   10
..  ...              ...  ...
80   19   to the left of    6
81   20  to the right of   15
82   20   to the left of   17
83   20   to the left of   13
84   20  to the right of   19

[85 rows x 3 columns]