Do you see surfboards that are black?
No, there is a surfboard but it is white.
    src        edge_attr  dst
0     1   to the left of    4
1     2   to the left of    8
2     3  to the right of   11
3     4  to the right of    1
4     5   to the left of   10
5     5   to the left of   11
6     8  to the right of    2
7     8  to the right of   10
8     8  to the right of    9
9     9   to the left of    8
10   10   to the left of    8
11   10  to the right of    5
12   11  to the right of    5
13   11   to the left of    3