Are there any bridges or carts?
Yes, there is a bridge.
    src        edge_attr  dst
0     9               on    1
1    12  to the right of   17
2    13  to the right of   17
3    14               in    8
4    14  to the right of   16
5    14  to the right of   19
6    15  to the right of   22
7    16               in   13
8    16   to the left of   14
9    17   to the left of   22
10   17   to the left of   13
11   17   to the left of   12
12   19               in    8
13   19   to the left of   14
14   22               in    8
15   22  to the right of   17
16   22   to the left of   15