What color does the bucket that the van is to the right of have?
The bucket has blue color.
    src        edge_attr  dst
0     1   to the left of    9
1     1  to the right of    2
2     1  to the right of   16
3     1  to the right of   15
4     2   to the left of    1
5     2   to the left of    5
6     4  to the right of    7
7     5   to the left of    9
8     5  to the right of    2
9     5   to the left of   14
10    5  to the right of   16
11    6  to the right of    7
12    7   to the left of    6
13    7   to the left of    4
14    7   to the left of   14
15    8   to the left of   14
16    8  to the right of   11
17    9  to the right of    5
18    9  to the right of    1
19   10   to the left of   14
20   11   to the left of   14
21   11   to the left of    8
22   12        on top of    5
23   14  to the right of    5
24   14  to the right of    7
25   14  to the right of    8
26   14  to the right of   10
27   14  to the right of   11
28   15   to the left of    1
29   16   to the left of    5
30   16   to the left of    1