The fan is on what?
The fan is on the desk.
    src        edge_attr  dst
0     0             near    7
1     0             near    6
2     0             near    1
3     1               on    0
4     1             near    0
5     1             near    6
6     1   to the left of    6
7     2               on    0
8     3               on    0
9     4               on    5
10    4   to the left of    5
11    5  to the right of    4
12    6             near    0
13    6             near    1
14    6  to the right of    1
15    6               on    0
16    7               on    0
17    7             near    0