Do you see both buns and hot dogs?
No, there is a hot dog but no buns.
     src        edge_attr  dst
0      0   to the left of   30
1      0  to the right of   25
2      0  to the right of   31
3      0   to the left of    8
4      0  to the right of    3
..   ...              ...  ...
187   31   to the left of   19
188   31   to the left of    7
189   31   to the left of    6
190   31   to the left of    3
191   31   to the left of    0

[192 rows x 3 columns]