Are there either traffic lights or fire hydrants in the picture?
Yes, there is a fire hydrant.
    src        edge_attr  dst
0     1   to the left of    4
1     1   to the left of   10
2     2  to the right of    3
3     2   to the left of   11
4     3   to the left of    2
5     3  to the right of    8
6     3   to the left of   11
7     4  to the right of    8
8     4  to the right of    1
9     4  to the right of    5
10    5   to the left of    4
11    5  to the right of    8
12    6               on    0
13    6           beside    8
14    6  to the right of    8
15    7  to the right of    8
16    8   to the left of    6
17    8   to the left of   10
18    8   to the left of    3
19    8   to the left of    7
20    8   to the left of    5
21    8   to the left of    4
22    9  to the right of   13
23   10  to the right of    8
24   10  to the right of    1
25   11  to the right of    2
26   11  to the right of    3
27   13   to the left of    9