What are the devices that are on the oven?
The devices are controllers.
    src         edge_attr  dst
0     1   to the right of    3
1     1   to the right of    7
2     2    to the left of    9
3     2   to the right of    8
4     2                on    7
5     3             below    7
6     3    to the left of    1
7     3  on the bottom of    7
8     5            inside    7
9     5                in    7
10    6    to the left of    9
11    6   to the right of    8
12    7   to the right of    8
13    7    to the left of    1
14    7    to the left of    9
15    8    to the left of   10
16    8    to the left of    2
17    8                on    9
18    8    to the left of    7
19    8    to the left of    6
20    9   to the right of    2
21    9   to the right of    6
22    9   to the right of    7
23    9   to the right of   10
24   10   to the right of    8
25   10    to the left of    9