Does the ground look rocky or sandy?
The ground is rocky.
    src        edge_attr  dst
0     0   to the left of   15
1     0   to the left of    6
2     0      in front of   16
3     0             near   15
4     1   to the left of   15
5     2  to the right of   15
6     3       covered by    8
7     4          next to   11
8     4  to the right of   13
9     5  to the right of   15
10    5  to the right of    6
11    5   to the left of   19
12    6  to the right of    0
13    6   to the left of    5
14    8         covering    3
15    9   to the left of   15
16   10   to the left of   18
17   11             near    4
18   13  to the right of   18
19   13   to the left of    4
20   14   to the left of   15
21   15  to the right of    0
22   15  to the right of    9
23   15  to the right of    1
24   15   to the left of    5
25   15   to the left of    2
26   15  to the right of   14
27   15             near    0
28   18  to the right of   10
29   18   to the left of   13
30   19  to the right of    5