Are there black bowls or fences?
Yes, there is a black fence.
    src        edge_attr  dst
0     0  to the right of    9
1     0  to the right of   10
2     0  to the right of   14
3     0  to the right of    1
4     0  to the right of    5
5     1   to the left of    0
6     1  to the right of    5
7     1   to the left of   18
8     2         watching   17
9     2  to the right of   12
10    3  to the right of   17
11    3  to the right of   16
12    3  to the right of    6
13    3  to the right of    7
14    4               on   11
15    4   to the left of   17
16    5   to the left of   18
17    5   to the left of    1
18    5   to the left of    0
19    6   to the left of    3
20    6  to the right of   15
21    6  to the right of   17
22    7   to the left of    3
23    8  to the right of   13
24    9   to the left of   17
25    9   to the left of   16
26    9   to the left of    0
27    9  to the right of   14
28   10   to the left of   17
29   10   to the left of    0
30   12   to the left of    2
31   13   to the left of    8
32   14   to the left of    0
33   14   to the left of   17
34   14   to the left of    9
35   15   to the left of    6
36   16               on   17
37   16   to the left of    3
38   16  to the right of    9
39   17  to the right of    9
40   17   to the left of    3
41   17   to the left of   18
42   17   to the left of    6
43   17  to the right of   10
44   17  to the right of   14
45   17  to the right of    4
46   18  to the right of   17
47   18  to the right of    5
48   18  to the right of    1