How big is the bridge near the tree?
The bridge is large.
    src        edge_attr  dst
0     0   to the left of   10
1     2               on    4
2     3             near    4
3     3  to the right of   10
4     3  to the right of    8
5     4      in front of   10
6     4             near    5
7     4             near    3
8     5          next to    4
9     5   to the left of    6
10    5             near    4
11    6  to the right of    5
12    7               in    8
13    8   to the left of    3
14   10           behind    4
15   10   to the left of    3
16   10  to the right of    0