Are there either any envelopes or umbrellas?
Yes, there is an umbrella.
     src        edge_attr  dst
0      0  to the right of   17
1      1  to the right of   30
2      1  to the right of   20
3      1   to the left of   31
4      1  to the right of   10
..   ...              ...  ...
129   31  to the right of    9
130   31  to the right of    1
131   31  to the right of   20
132   32   to the left of    9
133   32  to the right of    4

[134 rows x 3 columns]