Are there any black backpacks or briefcases in the picture?
No, there is a backpack but it is white.
    src    edge_attr  dst
0     0           by   11
1     3         near   11
2     5           by    8
3     8      next to    9
4     9      next to   11
5     9         near   11
6     9  in front of   11
7     9           by   12
8     9         near    8
9    11         near    3
10   11         near    9