Are there any tables to the right of the heater on the wall?
Yes, there is a table to the right of the heater.
    src        edge_attr  dst
0     0   to the left of    6
1     0               on    7
2     1  to the right of    4
3     1             near    6
4     3   to the left of    8
5     3   to the left of    6
6     3               on    7
7     4   to the left of    1
8     4   to the left of    8
9     5           around    9
10    6  to the right of    3
11    6  to the right of    0
12    6             near    8
13    6             near    1
14    8             near    6
15    8  to the right of    3
16    8  to the right of    4
17    8               at    6
18    9               on    7