What is the black bear sitting on?
The bear is sitting on the ground.
    src        edge_attr  dst
0     0               on    1
1     1             near    2
2     1   to the left of    3
3     2          next to    1
4     2    surrounded by    5
5     3  to the right of    1
6     3  to the right of    8
7     3  to the right of    7
8     3  to the right of    6
9     3  to the right of   15
10    4  to the right of   14
11    5   to the left of   13
12    5      surrounding    2
13    6      standing on    5
14    6     leaning over    5
15    6     hanging over    5
16    6   to the left of   11
17    6   to the left of   12
18    6       leaning on    5
19    6               on    5
20    6               in    2
21    6       sitting on   12
22    6   to the left of    3
23    7   to the left of    3
24    7   to the left of   11
25    8   to the left of    3
26    8   to the left of   11
27   11  to the right of    8
28   11  to the right of   15
29   11  to the right of    7
30   11  to the right of    6
31   12  to the right of    6
32   12   to the left of   13
33   12  to the right of   14
34   13  to the right of   12
35   13  to the right of    5
36   14   to the left of   12
37   14   to the left of    4
38   15   to the left of    3
39   15   to the left of   11
40   16               in    2