Are there either umbrellas or carts?
Yes, there are umbrellas.
     src        edge_attr  dst
0      0   to the left of   27
1      1  to the right of   36
2      1   to the left of   28
3      1   to the left of   17
4      1  to the right of   27
..   ...              ...  ...
131   37  to the right of   30
132   38  to the right of   25
133   39  to the right of   33
134   39   to the left of   18
135   39  to the right of    6

[136 rows x 3 columns]