What is the vehicle that the red bike is pulling?
The vehicle is a car.
    src        edge_attr  dst
0     2   to the left of    9
1     3  to the right of   11
2     3  to the right of   14
3     3  to the right of   13
4     5               in    4
5     6           behind    7
6     8  to the right of   14
7     8  to the right of   13
8     9  to the right of    2
9    11   to the left of    3
10   11             near   15
11   11          next to   15
12   12           behind   14
13   12   to the left of   14
14   12        pulled by   14
15   12   to the left of   13
16   13  to the right of   12
17   13               on   14
18   13   to the left of    3
19   13   to the left of    8
20   14      in front of   12
21   14   to the left of    8
22   14        parked in   15
23   14          pulling   12
24   14  to the right of   12
25   14   to the left of    3
26   15             near   11