Are there cars or trucks?
Yes, there is a truck.
    src        edge_attr  dst
0     0   to the left of   18
1     0   to the left of   11
2     0   to the left of   10
3     0   to the left of    8
4     0   to the left of   16
5     1   to the left of   14
6     2   to the left of   20
7     5   to the left of    7
8     5   to the left of   19
9     6               on   21
10    6  to the right of    7
11    7               on   11
12    7          wearing    0
13    7  to the right of    5
14    7  to the right of   12
15    7   to the left of    6
16    7        riding on   11
17    7          wearing   18
18    7          wearing   19
19    8   to the left of   16
20    8   to the left of   10
21    8  to the right of    0
22    9   to the left of   14
23   10  to the right of   16
24   10   to the left of   17
25   10  to the right of    0
26   10  to the right of    8
27   11  to the right of    0
28   11  to the right of   12
29   11               on    3
30   12        parked at    4
31   12   to the left of    7
32   12   to the left of   11
33   12   to the left of   18
34   12   to the left of   19
35   13               on    1
36   13   to the left of   14
37   14  to the right of    1
38   14  to the right of    9
39   14  to the right of   13
40   16   to the left of   10
41   16   to the left of   17
42   16  to the right of    0
43   16  to the right of    8
44   17  to the right of   16
45   17  to the right of   10
46   18  to the right of   12
47   18  to the right of    0
48   19  to the right of    5
49   19  to the right of   12
50   20  to the right of    2