Are there any balls or fences that are green?
Yes, the fence is green.
    src        edge_attr  dst
0     1   to the left of   12
1     2  to the right of    9
2     2  to the right of    5
3     2  to the right of   10
4     2   to the left of    4
5     3   to the left of   12
6     4  to the right of    2
7     4  to the right of    5
8     4  to the right of   10
9     4  to the right of    9
10    5   to the left of    4
11    5   to the left of    2
12    6   to the left of   12
13    7   to the left of   12
14    8   to the left of   12
15    8               of   10
16    9               of   10
17    9   to the left of    2
18    9   to the left of    4
19   10   to the left of    2
20   10   to the left of    4
21   10   to the left of   12
22   12  to the right of    6
23   12  to the right of    7
24   12  to the right of   10
25   12  to the right of    8
26   12  to the right of    1
27   12  to the right of    3