What's covering the floor?
The rug is covering the floor.
    src        edge_attr  dst
0     0   to the left of    1
1     1   to the left of    4
2     1  to the right of    0
3     1   to the left of    3
4     3  to the right of   13
5     3  to the right of    1
6     4  to the right of   13
7     4  to the right of    6
8     4  to the right of    1
9     6   to the left of    4
10    7         covering    9
11    7   to the left of   12
12    7   to the left of    8
13    8               of    2
14    8  to the right of    9
15    8  to the right of    7
16    8   to the left of   10
17    8   to the left of   14
18    9   to the left of   12
19    9   to the left of    8
20    9       covered by    7
21    9   to the left of   10
22    9   to the left of   14
23   10  to the right of   12
24   10  to the right of    9
25   10  to the right of    8
26   12   to the left of   10
27   12  to the right of    7
28   12  to the right of    9
29   12   to the left of   14
30   13   to the left of    3
31   13   to the left of    4
32   14  to the right of    8
33   14  to the right of   12
34   14  to the right of    9