What is this bear in front of?
The bear is in front of the tree.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    1
2     0  to the right of    9
3     0  to the right of    5
4     1   to the left of    0
5     1   to the left of    3
6     1   to the left of    8
7     1   to the left of   10
8     1   to the left of    2
9     1   to the left of   13
10    1   to the left of   12
11    1   to the left of    9
12    1   to the left of    5
13    1   to the left of    4
14    2  to the right of    1
15    3  to the right of    1
16    3   to the left of    0
17    4  to the right of    1
18    4  to the right of    5
19    5   to the left of    0
20    5  to the right of    1
21    5   to the left of    4
22    6           behind   13
23    7   to the left of   13
24    7             near   13
25    8  to the right of    1
26    9   to the left of    0
27    9   to the left of   10
28    9  to the right of    1
29   10  to the right of    9
30   10  to the right of    1
31   11   to the left of   13
32   12  to the right of    1
33   13  to the right of    7
34   13  to the right of    1
35   13  to the right of   11
36   13             near    7
37   13      in front of    6