What animal is on the truck?
The dog is on the truck.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of    4
2     0  to the right of    8
3     3   to the left of    5
4     3   to the left of   12
5     3   to the left of   17
6     3   to the left of   14
7     3   to the left of   18
8     3   to the left of    4
9     4  to the right of   12
10    4  to the right of   15
11    4  to the right of   17
12    4               in    2
13    4  to the right of    3
14    4   to the left of    0
15    4   to the left of    8
16    4  to the right of   18
17    5   on the back of   14
18    5               on   14
19    5  to the right of   15
20    5  to the right of    3
21    6   to the left of    0
22    7   to the left of   10
23    8  to the right of   18
24    8  to the right of    4
25    8   to the left of    0
26    9    going through   11
27    9  to the right of   14
28    9  to the right of   20
29   10               on    7
30   10  to the right of    7
31   12   to the left of   17
32   12   to the left of    4
33   12  to the right of    3
34   14  to the right of    3
35   14   to the left of    9
36   14               on   13
37   14   to the left of   20
38   15   to the left of   17
39   15   to the left of   19
40   15   to the left of    5
41   15   to the left of   18
42   15   to the left of    4
43   15               by    3
44   17  to the right of    3
45   17  to the right of   12
46   17  to the right of   15
47   17   to the left of   18
48   17   to the left of    4
49   17   to the left of   19
50   18  to the right of   15
51   18  to the right of   17
52   18  to the right of    3
53   18   to the left of    4
54   18   to the left of    8
55   19  to the right of   17
56   19  to the right of   15
57   20  to the right of   14
58   20   to the left of    9