Are there any dogs?
Yes, there is a dog.
    src        edge_attr  dst
0     0  to the right of   12
1     0  to the right of   13
2     1   to the left of   12
3     2   to the left of   12
4     2   to the left of    5
5     2   to the left of   11
6     3   to the left of    5
7     4   to the left of   12
8     5               by    6
9     5  to the right of    3
10    5   to the left of   12
11    5  to the right of    2
12    5   to the left of   11
13    7   to the left of    9
14    9  to the right of    7
15   11  to the right of    5
16   11  to the right of    2
17   12  to the right of    1
18   12  to the right of    4
19   12  to the right of    5
20   12  to the right of    2
21   12   to the left of    0
22   13   to the left of    0