What is the vehicle to the right of the car on the left?
The vehicle is a bus.
    src        edge_attr  dst
0     1  to the right of    3
1     1  to the right of    7
2     1  to the right of    2
3     1               on    4
4     1  to the right of   10
5     2   to the left of    5
6     2   to the left of    1
7     3   to the left of    1
8     4   to the left of    5
9     5  to the right of   12
10    5  to the right of    2
11    5  to the right of    4
12    6  to the right of   10
13    6  to the right of    7
14    7  to the right of    8
15    7   to the left of    6
16    7   to the left of    1
17    8   to the left of    7
18    8   to the left of   10
19    9  to the right of   10
20   10   to the left of    6
21   10  to the right of    8
22   10  to the right of   11
23   10   to the left of    1
24   10   to the left of    9
25   11   to the left of   10
26   11   to the left of   14
27   12   to the left of    5
28   14  to the right of   11