How big is the pipe that is gray?
The pipe is large.
     src        edge_attr  dst
0      0   to the left of    9
1      1   to the left of   11
2      1   to the left of   13
3      1   to the left of   19
4      1   to the left of   14
..   ...              ...  ...
114   21   to the left of   14
115   21   to the left of   11
116   21   to the left of    6
117   22  to the right of    9
118   22  to the right of   14

[119 rows x 3 columns]