What is the chain on?
The chain is on the fire hydrant.
    src        edge_attr  dst
0     0  to the right of   10
1     0  to the right of    4
2     2  to the right of    7
3     2  to the right of    4
4     2  to the right of   10
5     4   to the left of    5
6     4   to the left of    2
7     4   to the left of    0
8     5               on    0
9     5  to the right of    4
10    5  to the right of   10
11    7   to the left of    2
12   10   to the left of    5
13   10   to the left of    2
14   10   to the left of    0