What is the appliance that is inside the dark kitchen?
The appliance is a refrigerator.
    src        edge_attr  dst
0     0   to the left of   11
1     1        on top of    2
2     3        on top of    2
3     4   to the left of    6
4     4        on top of    7
5     5   to the left of   11
6     5   to the left of   13
7     6  to the right of    4
8     6  to the right of    7
9     7   to the left of    6
10    9   to the left of   13
11    9   to the left of   11
12    9       mounted on    5
13   10   to the left of   13
14   11  to the right of    9
15   11           inside   12
16   11  to the right of    5
17   11  to the right of    0
18   13  to the right of   10
19   13  to the right of    9
20   13  to the right of    5