Is this a black bear?
No, this is a white bear.
    src        edge_attr  dst
0     0               of    1
1     1   to the left of    3
2     2  to the right of    7
3     3  to the right of    9
4     3  to the right of    6
5     3  to the right of    1
6     4  to the right of   10
7     4               of    1
8     6   to the left of    3
9     7   to the left of    2
10    9  to the right of   11
11    9  to the right of   10
12    9   to the left of    3
13   10               of    1
14   10   to the left of    4
15   10   to the left of   11
16   10   to the left of    9
17   11               of    1
18   11  to the right of   10
19   11   to the left of    9