What is the salt shaker sitting on?
The salt shaker is sitting on the table.
    src        edge_attr  dst
0     0        served on    7
1     0   to the left of    1
2     1            above   13
3     1       sitting on   12
4     1  to the right of    9
5     1  to the right of    3
6     1  to the right of    7
7     1  to the right of    0
8     2       sitting on   14
9     2               in   10
10    3   to the left of    8
11    3        served on    7
12    3               on    7
13    3       sitting on    7
14    3   to the left of    1
15    4  to the right of   13
16    7       sitting on   12
17    7   to the left of    1
18    7   to the left of   11
19    7   to the left of    8
20    8  to the right of    3
21    8  to the right of    7
22    9   to the left of    1
23   10               on   14
24   10   to the left of   13
25   10       sitting on   14
26   11  to the right of    7
27   11  to the right of   13
28   13   to the left of   11
29   13  to the right of   10
30   13            under    1
31   13   to the left of    4