What is the dog in?
The dog is in the bed.
    src        edge_attr  dst
0     0   to the left of    9
1     0  to the right of    6
2     1   to the left of   12
3     5               of   14
4     6   to the left of    9
5     6   to the left of    0
6     6   to the left of   16
7     6   to the left of   10
8     7  to the right of    8
9     8   to the left of    7
10    9  to the right of    0
11    9  to the right of    6
12    9   to the left of   12
13   10  to the right of    6
14   12  to the right of   16
15   12  to the right of    9
16   12  to the right of    1
17   14         lying in    2
18   14               in    2
19   16   to the left of   12
20   16  to the right of    6