What vehicle is to the right of the bus?
The vehicle is a car.
    src        edge_attr  dst
0     1   to the left of   10
1     1   to the left of    3
2     1   to the left of    4
3     3   to the left of    6
4     3  to the right of    1
5     4   to the left of    5
6     4  to the right of    1
7     5  to the right of    4
8     6  to the right of    3
9     6   to the left of   11
10    7  to the right of   12
11   10  to the right of    1
12   11  to the right of   12
13   11  to the right of    6
14   12   to the left of   11
15   12   to the left of    7