Do the car and the bicycle have a different colors?
No, both the car and the bicycle are black.
    src        edge_attr  dst
0     0  to the right of   15
1     0  to the right of   13
2     0  to the right of    7
3     0               on   16
4     1   to the left of   10
5     1   to the left of   11
6     1  to the right of   13
7     1   to the left of    2
8     1   to the left of    4
9     1  to the right of    7
10    1  to the right of   15
11    2  to the right of    1
12    4   to the left of   10
13    4           riding   11
14    4  to the right of    1
15    7   to the left of    0
16    7   to the left of    1
17    7   to the left of   13
18    8          pulling   15
19    8   to the left of   13
20   10  to the right of   11
21   10  to the right of    1
22   10  to the right of    4
23   11   to the left of   10
24   11  to the right of    1
25   12             with    3
26   12               on    7
27   13   to the left of    1
28   13  to the right of   15
29   13   to the left of    0
30   13  to the right of    8
31   13  to the right of    7
32   15   to the left of    0
33   15   to the left of   13
34   15   to the left of    1
35   15        pulled by    8