What is the device that the antenna is behind called?
The device is a cell phone.
   src        edge_attr  dst
0    0               of    3
1    0  to the right of    3
2    2        on top of    3
3    2      in front of    5
4    3   to the left of    0
5    4   on the side of    3
6    5           behind    2
7    5               on    3
8    7               of    3