Which color is the cap?
The cap is black.
     src        edge_attr  dst
0      1  to the right of    3
1      1  to the right of   12
2      1  to the right of   20
3      1  to the right of   14
4      1  to the right of   13
..   ...              ...  ...
187   25  to the right of   26
188   25   to the left of    5
189   25   to the left of   18
190   26   to the left of   23
191   26   to the left of   25

[192 rows x 3 columns]