What's on the shelf?
The towel is on the shelf.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of   14
2     0   to the left of    3
3     0   to the left of    2
4     2  to the right of    0
5     3   to the left of    4
6     3               on    6
7     3  to the right of    0
8     4   to the left of   13
9     4  to the right of    3
10    4  to the right of    6
11    5   to the left of   13
12    6  to the right of    0
13    6   to the left of    4
14    7  to the right of   12
15    7  to the right of    9
16    7            below   10
17    9               in    1
18    9   to the left of   12
19    9   to the left of    7
20   10  to the right of   11
21   10            above    7
22   10               on    4
23   11   to the left of   10
24   12   to the left of    7
25   12  to the right of    9
26   13  to the right of    4
27   13  to the right of    5
28   14  to the right of    0