Are there any umbrellas or bridges that are brown?
Yes, the bridge is brown.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    3
2     2            above    3
3     2            above    8
4     3  to the right of   13
5     3  to the right of    0
6     4            under    8
7     4            below    8
8     4  to the right of    0
9     8            above    4
10   13   to the left of    3