Is the small toy sad or happy?
The teddy bear is sad.
   src        edge_attr  dst
0    0   to the left of    1
1    1  to the right of    0
2    2   to the left of    4
3    3  to the right of    5
4    3            above    7
5    4  to the right of    2
6    5   to the left of    6
7    5   to the left of    3
8    6  to the right of    5