Are there trucks or airplanes that are green?
Yes, the airplane is green.
    src        edge_attr  dst
0     0               in    4
1     1   to the left of    7
2     1   to the left of    8
3     3  to the right of    8
4     6               in    4
5     7               of    0
6     7  to the right of    9
7     7  to the right of    1
8     7  to the right of    8
9     8               of    0
10    8   to the left of    3
11    8   to the left of    7
12    8  to the right of    1
13    8  to the right of    9
14    9   to the left of    7
15    9   to the left of    8
16    9               of    0