What vehicle is not colorful, the bus or the taxi?
The taxi is not colorful.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of   10
2     1  to the right of    5
3     2  to the right of   11
4     2  to the right of   10
5     2   to the left of    9
6     5   to the left of    1
7     7           beside    6
8     9  to the right of    2
9     9  to the right of   11
10   10   to the left of   11
11   10   to the left of    2
12   10  to the right of    0
13   11   to the left of    2
14   11  to the right of    0
15   11  to the right of   10
16   11   to the left of    9