What is the person doing?
The person is waiting.
   src        edge_attr  dst
0    0  to the right of    6
1    0   to the left of    4
2    1  to the right of    6
3    2  to the right of    4
4    3  to the right of    4
5    4  to the right of    0
6    4   to the left of    3
7    4   to the left of    2
8    6   to the left of    0
9    6   to the left of    1