What is on the trunk?
The moss is on the trunk.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    1
2     1  to the right of    4
3     1  to the right of    5
4     1   to the left of    0
5     2  to the right of    5
6     3            under    5
7     3            below    5
8     4   to the left of    1
9     5   to the left of    0
10    5   to the left of    2
11    5   to the left of    1
12    6               on    5
13    6               on    4
14    7               on    5