The oil is where?
The oil is on the pavement.
    src        edge_attr  dst
0     0   to the left of   11
1     2   to the left of    5
2     3  to the right of    8
3     3   to the left of   13
4     3   to the left of   10
5     4               on    1
6     5  to the right of    2
7     5  to the right of   12
8     7      in front of   12
9     8   to the left of    3
10    8   to the left of   12
11   10  to the right of    3
12   10   to the left of   14
13   11  to the right of   12
14   11  to the right of    0
15   11  to the right of   13
16   12   to the left of   11
17   12           behind    7
18   12   to the left of    5
19   12  to the right of    8
20   13               on   14
21   13  to the right of    3
22   13   to the left of   11
23   13   to the left of   14
24   14  to the right of   10
25   14  to the right of   13