What animal is the bell on?
The bell is on the cow.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    3
2     0   to the left of    2
3     1  to the right of    0
4     1  to the right of    4
5     1  to the right of   10
6     1   to the left of    3
7     1  to the right of   12
8     2  to the right of    4
9     2  to the right of    0
10    2  to the right of   10
11    2   to the left of    3
12    2  to the right of   12
13    3  to the right of    0
14    3  to the right of    1
15    3  to the right of    2
16    4   to the left of    2
17    4  to the right of    6
18    4  to the right of    7
19    4  to the right of   12
20    4  to the right of   13
21    4   to the left of    1
22    6   to the left of   10
23    6   to the left of    4
24    7   to the left of    4
25    9               on    0
26   10  to the right of   12
27   10  to the right of   13
28   10   to the left of    1
29   10   to the left of    2
30   10  to the right of    6
31   12   to the left of    1
32   12   to the left of    4
33   12   to the left of   10
34   12   to the left of    2
35   13   to the left of    4
36   13   to the left of   10
37   14               on   15