What is carrying the dog?
The truck is carrying the dog.
     src        edge_attr  dst
0      1   to the left of    6
1      1   to the left of    5
2      2  to the right of   17
3      2  to the right of   18
4      2   to the left of    9
..   ...              ...  ...
127   20   to the left of    9
128   20   to the left of    3
129   20   to the left of    5
130   20   to the left of   11
131   20   to the left of   16

[132 rows x 3 columns]