What shape is the plate?
The plate is rectangular.
    src        edge_attr  dst
0     1   to the left of    2
1     1   to the left of   11
2     2  to the right of    7
3     2  to the right of   14
4     2  to the right of   10
5     2  to the right of   15
6     2  to the right of    1
7     3               on    6
8     6   to the left of   11
9     7   to the left of    2
10    7   to the left of   11
11   10   to the left of    2
12   10   to the left of   11
13   11  to the right of    7
14   11  to the right of   10
15   11  to the right of   14
16   11  to the right of   15
17   11  to the right of    1
18   11  to the right of    6
19   14   to the left of    2
20   14   to the left of   11
21   15   to the left of    2
22   15   to the left of   11