What is the oil on?
The oil is on the paper.
    src        edge_attr  dst
0     2  to the right of   16
1     3   to the left of   12
2     4  to the right of   16
3     4   to the left of    5
4     5  to the right of    4
5     5               of   15
6     5  to the right of   16
7     8   to the left of   12
8     8  to the right of   13
9     8               on    3
10   10   to the left of   11
11   11               on   12
12   11  to the right of   10
13   11  to the right of   15
14   11  to the right of   19
15   12  to the right of   19
16   12  to the right of   17
17   12  to the right of    3
18   12  to the right of   15
19   12  to the right of    8
20   13   to the left of    8
21   13   to the left of   17
22   14  to the right of   16
23   15   to the left of   11
24   15   to the left of   12
25   15   to the left of   20
26   15          wearing   10
27   16               of   15
28   16   to the left of    5
29   16   to the left of    4
30   16   to the left of    2
31   16   to the left of   14
32   17               of    8
33   17               on    3
34   17   to the left of   12
35   17  to the right of   13
36   18   to the left of   20
37   19   to the left of   12
38   19   to the left of   20
39   19   to the left of   11
40   20  to the right of   15
41   20  to the right of   19
42   20  to the right of   18
43   21               of    8