What is on the black island?
The counter top is on the island.
    src        edge_attr  dst
0     0   to the left of   15
1     0   to the left of    4
2     0   to the left of    1
3     0  to the right of   10
4     0  to the right of    5
..  ...              ...  ...
56   17   to the left of    4
57   17   to the left of    1
58   17   to the left of   12
59   17   to the left of    2
60   17   to the left of    9

[61 rows x 3 columns]