What is the man using?
The man is using a computer mouse.
   src        edge_attr  dst
0    2   to the left of    3
1    3               on    8
2    3  to the right of    6
3    3  to the right of    2
4    3  to the right of    7
5    5  to the right of    9
6    6   to the left of    3
7    6            using    0
8    7   to the left of    3
9    9   to the left of    5