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