What is the cat in?
The cat is in the window.
    src        edge_attr  dst
0     3   to the left of   10
1     3               in    0
2     4   to the left of   10
3     5   to the left of   10
4     6   to the left of   10
5     7   to the left of   10
6    10  to the right of   12
7    10  to the right of    3
8    10  to the right of    4
9    10  to the right of    5
10   10  to the right of    6
11   10  to the right of    7
12   12   to the left of   10