Is that mask red or blue?
The mask is blue.
     src        edge_attr  dst
0      0  to the right of    8
1      0  to the right of   10
2      0  to the right of    4
3      0  to the right of   33
4      0  to the right of   11
..   ...              ...  ...
144   33   to the left of    0
145   33  to the right of    8
146   33  to the right of   13
147   33  to the right of    1
148   33  to the right of    5

[149 rows x 3 columns]