What's on the door?
The lock is on the door.
    src        edge_attr  dst
0     1   to the left of   10
1     1   to the left of    4
2     1   to the left of   11
3     1       leaning on    7
4     2        on top of    7
5     2       hanging on    7
6     3               on    9
7     4   to the left of    8
8     4  to the right of    1
9     5  to the right of    9
10    6     growing from    5
11    6       growing in    5
12    6       growing by    5
13    6  to the right of    9
14    8  to the right of    4
15    8  to the right of   11
16    9   to the left of    6
17    9   to the left of    5
18   10  to the right of    1
19   11  to the right of    1
20   11   to the left of    8
21   13               by    4