Who is carrying the bags?
The pedestrians are carrying the bags.
    src        edge_attr  dst
0     0   to the left of    4
1     1  to the right of    4
2     2   to the left of    4
3     4  to the right of    0
4     4  to the right of    2
5     4   to the left of    1
6     4   to the left of    7
7     6  to the right of    8
8     7         carrying    1
9     7  to the right of    4
10    8   to the left of    6
11    8   to the left of   11
12   11  to the right of    8