What is inside the suitcase?
The pocket is inside the suitcase.
    src        edge_attr  dst
0     0  to the right of   11
1     0   to the left of    4
2     1   to the left of    4
3     1   to the left of    9
4     2  to the right of   16
5     4   to the left of   10
6     4  to the right of    0
7     4           inside   14
8     4  to the right of    9
9     4  to the right of    1
10    6   to the left of   15
11    9   to the left of    4
12    9  to the right of    1
13   10  to the right of    4
14   10           inside   14
15   11   to the left of    0
16   12               on    1
17   13            under   14
18   14            above   13
19   15  to the right of    6
20   16   to the left of    2