Are there both trucks and airplanes?
Yes, there are both an airplane and a truck.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of   14
2     1  to the right of    5
3     1  to the right of    2
4     1  to the right of   15
5     1  to the right of    9
6     2   to the left of    1
7     2   to the left of    9
8     2   to the left of    3
9     2   to the left of    8
10    2   to the left of    5
11    3  to the right of    2
12    3  to the right of    9
13    3  to the right of    5
14    5  to the right of    2
15    5   to the left of    3
16    5  to the right of   14
17    5   to the left of    1
18    7   to the left of   14
19    7  to the right of    0
20    7   to the left of    8
21    8  to the right of    7
22    8  to the right of   14
23    8  to the right of    2
24    9   to the left of    1
25    9  to the right of    2
26    9   to the left of    3
27    9  to the right of   14
28   10  to the right of   15
29   14   to the left of    5
30   14  to the right of    7
31   14   to the left of    9
32   14   to the left of    8
33   14  to the right of    0
34   15   to the left of    1
35   15   to the left of   10