What is on the dark rock?
The moss is on the rock.
    src        edge_attr  dst
0     0  to the right of    4
1     0               on    3
2     0  to the right of    8
3     1   to the left of   10
4     1   to the left of   13
5     2  to the right of    5
6     2  to the right of   14
7     3  to the right of    5
8     4   to the left of    0
9     5   to the left of    2
10    5   to the left of    3
11    6  to the right of   11
12    6  to the right of   10
13    6  to the right of   12
14    7      standing on    2
15    7       perched on    2
16    7      standing on    3
17    8   to the left of    0
18    9   to the left of   10
19    9   to the left of   13
20   10  to the right of    9
21   10   to the left of    6
22   10  to the right of   11
23   10  to the right of    1
24   11  to the right of   12
25   11   to the left of    6
26   11   to the left of   10
27   12   to the left of    6
28   12   to the left of   11
29   13               of    7
30   13  to the right of    9
31   13  to the right of    1
32   14   to the left of    2