The cat is on what?
The cat is on the sofa.
    src        edge_attr  dst
0     0   to the left of    4
1     1  to the right of    5
2     1  to the right of    2
3     2   to the left of    4
4     2   to the left of    1
5     2   to the left of    7
6     2   to the left of    8
7     4  to the right of    2
8     4               on    3
9     4  to the right of    0
10    5   to the left of    1
11    5   to the left of    7
12    7  to the right of    2
13    7  to the right of    5
14    8  to the right of    2