How large is the boat in the center?
The boat is large.
    src        edge_attr  dst
0     0             near    1
1     0               in    3
2     0          next to    2
3     0             near    2
4     0          next to    1
5     0            below    1
6     0   to the left of    2
7     1             near    0
8     1            above    2
9     1             near    2
10    2          next to    3
11    2               on    3
12    2            below    1
13    2             near    1
14    2             near    0
15    2          next to    0
16    2               in    3
17    2  to the right of    0
18    2             near    3
19    3             near    2