Where are the trucks?
The trucks are at the airport.
    src        edge_attr  dst
0     0   to the left of   13
1     0   to the left of    8
2     0  to the right of    2
3     0             near   12
4     1  to the right of   10
5     1  to the right of   13
6     2   to the left of    8
7     2   to the left of    0
8     2   to the left of    5
9     2   to the left of   12
10    3           around   10
11    4             near   10
12    4           around   10
13    4               at    9
14    5  to the right of   12
15    5  to the right of    2
16    6   to the left of    8
17    7      in front of   10
18    8  to the right of    0
19    8  to the right of    2
20    8  to the right of   12
21    8  to the right of    6
22    8               at    9
23   10   to the left of    1
24   10             near    4
25   10           behind    7
26   10               at    9
27   10               on    3
28   10        parked at    9
29   12  to the right of    2
30   12   to the left of    5
31   12             near    0
32   12   to the left of   13
33   12   to the left of    8
34   13  to the right of   12
35   13   to the left of    1
36   13  to the right of    0