Which kind of vehicle is black?
The vehicle is a car.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    2
2     1       walking on    9
3     1  to the right of    7
4     1  to the right of    8
5     2  to the right of    0
6     3  to the right of    8
7     3  to the right of   10
8     6  to the right of    7
9     7   to the left of   10
10    7   to the left of    6
11    7   to the left of    1
12    7   to the left of    8
13    8   to the left of    3
14    8   to the left of    1
15    8   to the left of   10
16    8  to the right of    7
17   10  to the right of    8
18   10  to the right of    7
19   10  to the right of    0
20   10   to the left of    3