Are the trees behind a bus?
Yes, the trees are behind a bus.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    1
2     0  to the right of    6
3     1  to the right of    6
4     1   to the left of    5
5     1   to the left of    0
6     2             near    9
7     2      in front of    3
8     2            below    7
9     2               on    4
10    2  to the right of    8
11    2   to the left of    9
12    3           behind    2
13    5  to the right of    1
14    5  to the right of    0
15    6   to the left of    0
16    6   to the left of    1
17    8   to the left of    2
18    9  to the right of    2
19    9          next to    2