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