What's the ship made of?
The ship is made of wood.
    src        edge_attr  dst
0     0   to the left of    4
1     1            above    2
2     1            below    3
3     3               in    1
4     3               on    1
5     3     traveling on    1
6     4  to the right of    5
7     4  to the right of    0
8     4  to the right of    6
9     5   to the left of    4
10    6   to the left of    4