Is this a brown cow?
Yes, this is a brown cow.
    src        edge_attr  dst
0     1           eating   12
1     1               on   10
2     1      standing on   10
3     1   to the left of    6
4     1   to the left of    2
5     2  to the right of    1
6     3  to the right of    8
7     3  to the right of   11
8     6  to the right of    1
9     7  to the right of   11
10    7  to the right of    8
11    8   to the left of    3
12    8  to the right of    9
13    8   to the left of    7
14    8   to the left of   12
15    9   to the left of    8
16   11   to the left of   12
17   11   to the left of    7
18   11   to the left of    3
19   12  to the right of    8
20   12  to the right of   11