Where is the device, on the right or on the left of the image?
The device is on the right of the image.
   src        edge_attr  dst
0    2   to the left of    4
1    2   to the left of    3
2    2             near    4
3    3  to the right of    2
4    4        on top of    1
5    4  to the right of    2
6    4             near    2
7    4          next to    2