Who is eating the sandwich?
The boy is eating the sandwich.
     src        edge_attr  dst
0      0   to the left of   17
1      0   to the left of   16
2      0   to the left of    5
3      0   to the left of   23
4      0   to the left of   21
..   ...              ...  ...
98    21  to the right of    0
99    23  to the right of   12
100   23   to the left of   20
101   23  to the right of    0
102   23  to the right of    4

[103 rows x 3 columns]