What color is the ship?
The ship is black.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    3
2     0  to the right of    4
3     0   to the left of    7
4     1  to the right of    0
5     1  to the right of    2
6     1               on    7
7     2               on    0
8     2   to the left of    3
9     2   to the left of    1
10    2   to the left of    7
11    3  to the right of    0
12    3  to the right of    2
13    4   to the left of    0
14    4               in    5
15    6               in    5
16    7  to the right of    0
17    7  to the right of    2