Which place is it?
It is a hallway.
    src        edge_attr  dst
0     0               of    4
1     0   to the left of    3
2     0   to the left of    1
3     0   to the left of    6
4     0   to the left of    2
5     0   to the left of    5
6     1  to the right of    0
7     1               on    6
8     2  to the right of    0
9     2   to the left of    6
10    3  to the right of    0
11    3   to the left of    6
12    4   to the left of    6
13    5  to the right of    0
14    5               on    6
15    6  to the right of    3
16    6  to the right of    4
17    6  to the right of    0
18    6  to the right of    2