What do the label and the cap have in common?
The color, both the label and the cap are blue.
     src        edge_attr  dst
0      0  to the right of   33
1      0  to the right of   31
2      0  to the right of   10
3      0  to the right of    9
4      0  to the right of   28
..   ...              ...  ...
256   34   to the left of   29
257   35  to the right of    2
258   35  to the right of   32
259   36   to the left of   15
260   36   to the left of   11

[261 rows x 3 columns]