Who is walking with the children?
The boy is walking with the children.
     src        edge_attr  dst
0      0   to the left of   21
1      0  to the right of    7
2      0   to the left of   11
3      0   to the left of   17
4      0   to the left of   18
..   ...              ...  ...
139   21  to the right of    1
140   21  to the right of   13
141   21  to the right of    0
142   21  to the right of    6
143   21  to the right of   12

[144 rows x 3 columns]