What is under the cat?
The notebook is under the cat.
    src        edge_attr  dst
0     1   to the left of    7
1     1            above   10
2     5   to the left of    7
3     7  to the right of    9
4     7  to the right of   10
5     7  to the right of    8
6     7  to the right of    5
7     7  to the right of    1
8     7  to the right of   12
9     8  to the right of    9
10    8  to the right of   12
11    8   to the left of    7
12    9   to the left of    7
13    9   to the left of    8
14   10   to the left of    7
15   10            under    1
16   10            below    1
17   12   to the left of    8
18   12   to the left of    7