What color is the cap, black or blue?
The cap is black.
    src       edge_attr  dst
0     0  to the left of   17
1     1  to the left of    5
2     1  to the left of   17
3     2  to the left of   10
4     2  to the left of    3
..  ...             ...  ...
71   17              of    5
72   18  to the left of   10
73   18  to the left of   11
74   20  to the left of    4
75   20  to the left of   11

[76 rows x 3 columns]