What is the lock on?
The lock is on the suitcase.
    src        edge_attr  dst
0     1   to the left of    5
1     1   to the left of    9
2     1            above    7
3     2               on    7
4     3               on    2
5     4               on    2
6     5  to the right of    1
7     5       sitting on    2
8     6               on    2
9     8   to the left of   10
10    8               on    0
11    9               on    2
12    9  to the right of    1
13   10  to the right of    8