Are the trees in front of the hill short or tall?
The trees are short.
    src        edge_attr  dst
0     0   to the left of   11
1     0  to the right of    2
2     2   to the left of    9
3     2   to the left of    0
4     4   to the left of    5
5     4   to the left of   11
6     4  to the right of    7
7     4           behind   11
8     5  to the right of   11
9     5  to the right of    4
10    7   to the left of   11
11    7   to the left of    4
12    9  to the right of    2
13    9   to the left of   11
14   10  to the right of   11
15   11      in front of    4
16   11  to the right of    9
17   11   to the left of   10
18   11  to the right of    4
19   11  to the right of    0
20   11  to the right of    7
21   11   to the left of    5