What's the boy sitting on?
The boy is sitting on the chair.
    src        edge_attr  dst
0     1   to the left of   14
1     1   to the left of    3
2     3          wearing   14
3     3       sitting on    0
4     3   to the left of    7
5     3   to the left of   18
6     3  to the right of   12
7     3  to the right of    1
8     4  to the right of   10
9     4   to the left of   16
10    4  to the right of    8
11    6   to the left of   17
12    6  to the right of   12
13    7  to the right of   13
14    7  to the right of   11
15    7             with   18
16    7  to the right of    3
17    8   to the left of   16
18    8               on   15
19    8   to the left of    9
20    8   to the left of    4
21    9               on   15
22    9  to the right of   10
23    9             with   16
24    9  to the right of    8
25   10               on    5
26   10   to the left of    4
27   10   to the left of    9
28   11   to the left of    7
29   12   to the left of    3
30   12   to the left of   14
31   12   to the left of    6
32   13   to the left of    7
33   14  to the right of    1
34   14  to the right of   12
35   16  to the right of    8
36   16  to the right of    4
37   17  to the right of    6
38   18  to the right of    3