What are the people on?
The people are on the ship.
    src        edge_attr  dst
0     0               on    8
1     1               of    6
2     2               of    6
3     2  to the right of    3
4     3               of    6
5     3   to the left of    2
6     4            above    9
7     4      coming from    8
8     4   to the left of    7
9     5   to the left of    7
10    6         carrying    0
11    7  to the right of    5
12    7  to the right of    4
13    8               in    9
14    8         carrying    0
15    8               on    9
16    9           around    6