Is the sky near the tree blue and clean?
Yes, the sky is blue and clean.
    src        edge_attr  dst
0     0             near    1
1     0   to the left of    1
2     1            below    2
3     1               on    0
4     1             near    0
5     1      in front of    4
6     1             near    4
7     1               in    0
8     1  to the right of    0
9     2             near    4
10    2   to the left of    4
11    3  to the right of    5
12    3   to the left of    4
13    4           behind    1
14    4             near    1
15    4             near    2
16    4  to the right of    2
17    4  to the right of    5
18    4               in    0
19    4  to the right of    3
20    5   to the left of    4
21    5   to the left of    3