Are there both bridges and trains in the photo?
Yes, there are both a bridge and a train.
    src        edge_attr  dst
0     0          next to   15
1     0             near   15
2     0  to the right of   14
3     0               by   15
4     1            above    6
5     1            above   15
6     1             near   10
7     1   to the left of    3
8     1          next to   10
9     2  to the right of   10
10    2  to the right of    8
11    2               on    1
12    3           beside    1
13    3   on the side of    1
14    3  to the right of    1
15    3  to the right of    6
16    4               on    5
17    6            under    1
18    6   to the left of    3
19    7               in   13
20    8               on   10
21    8  to the right of   11
22    8               on    1
23    8   to the left of    2
24    9               on   10
25    9  to the right of   11
26   10            above   14
27   10             near    1
28   10   to the left of    2
29   10            above   15
30   11   to the left of    9
31   11   to the left of    8
32   11               on    1
33   11               on   10
34   12               of   10
35   14   to the left of    0
36   15             near    0