What are the plates on?
The plates are on the door.
    src        edge_attr  dst
0     0  to the right of   15
1     1   to the left of   18
2     1   to the left of   17
3     1           behind    2
4     1  to the right of   14
..  ...              ...  ...
56   19               on   16
57   19   to the left of    7
58   20   to the left of   18
59   21  to the right of   15
60   21  to the right of   16

[61 rows x 3 columns]