Do the dog and the van have a different colors?
No, both the dog and the van are white.
    src        edge_attr  dst
0     2  to the right of   13
1     2  to the right of    5
2     2   to the left of   17
3     2  to the right of   16
4     3               on    6
5     3  to the right of    4
6     3   to the left of   17
7     3   to the left of   12
8     4   to the left of    7
9     4   to the left of    3
10    4   to the left of    8
11    4   to the left of   10
12    5   to the left of    2
13    5  to the right of   16
14    5   to the left of   13
15    7  to the right of    4
16    7   to the left of   12
17    8   to the left of   15
18    8  to the right of    4
19    9               on    4
20   10  to the right of    4
21   12  to the right of    3
22   12  to the right of    7
23   13   to the left of    2
24   13  to the right of   16
25   13  to the right of    5
26   14   to the left of   16
27   15  to the right of    8
28   16   to the left of    5
29   16  to the right of   14
30   16   to the left of   13
31   16   to the left of    2
32   17  to the right of    3
33   17  to the right of    2