What is the bear on?
The bear is on the tree.
    src        edge_attr  dst
0     0  to the right of    7
1     0               in    9
2     0               on   14
3     0   to the left of   17
4     0  to the right of   14
5     1  to the right of   14
6     3  to the right of   15
7     5  to the right of    7
8     5  to the right of   14
9     7   to the left of    5
10    7   to the left of    0
11   10  to the right of   14
12   11  to the right of   14
13   12   to the left of   17
14   14   to the left of    5
15   14   to the left of   10
16   14   to the left of   11
17   14   to the left of    1
18   14   to the left of    0
19   14               in    9
20   15   to the left of    3
21   17  to the right of   12
22   17  to the right of    0