What is the height of the trees behind the cow?
The trees are tall.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    7
2     1  to the right of    7
3     2  to the right of    0
4     2  to the right of    7
5     5          beneath    8
6     5            below    8
7     6      in front of    9
8     7               on    5
9     7   to the left of    1
10    7   to the left of    0
11    7   to the left of    8
12    7   to the left of    2
13    8  to the right of    7
14    8            above    5
15    9           behind    6