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