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