What's the weight of the door?
The door is heavy.
    src        edge_attr  dst
0     1   to the left of    8
1     1          wearing   10
2     1          wearing   13
3     1   to the left of    6
4     1   to the left of   15
5     3   to the left of    7
6     3   to the left of   14
7     4               on    3
8     4  to the right of   13
9     4   to the left of    8
10    6   to the left of    7
11    6  to the right of    1
12    7  to the right of    6
13    7  to the right of    3
14    7  to the right of   15
15    7  to the right of    8
16    8               on    2
17    8  to the right of    4
18    8  to the right of    1
19    8  to the right of   13
20    8   to the left of    7
21   10   to the left of   15
22   12               of   13
23   13   to the left of    8
24   13   to the left of    4
25   14  to the right of    3
26   14  to the right of   15
27   15   to the left of    7
28   15  to the right of    1
29   15   to the left of   14
30   15               on    3
31   15  to the right of   10