What appliance is the cat in front of?
The cat is in front of the radiator.
   src    edge_attr  dst
0    0           of    4
1    1           of    4
2    2       behind    5
3    2       behind    4
4    4        under    5
5    4  in front of    2
6    4        below    5
7    5        above    4
8    5  in front of    2