Do you see any palm trees to the right of the vehicles that look gray?
Yes, there is a palm tree to the right of the vehicles.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    9
2     1   to the left of    9
3     1   to the left of    5
4     2   to the left of    9
5     2   to the left of    5
6     3  to the right of    0
7     3  to the right of    8
8     4  to the right of    8
9     5  to the right of    8
10    5  to the right of    1
11    5  to the right of    2
12    7   to the left of    9
13    8   to the left of    4
14    8   to the left of    9
15    8   to the left of    3
16    8   to the left of    5
17    9  to the right of    8
18    9  to the right of    2
19    9  to the right of    1
20    9  to the right of    0
21    9  to the right of    7