Is it outdoors?
No, it is indoors.
    src        edge_attr  dst
0     1   to the left of    7
1     1   to the left of   12
2     1   to the left of    4
3     1   to the left of    9
4     2  to the right of    7
5     2  to the right of   12
6     4  to the right of    9
7     4               of   12
8     4  to the right of    1
9     7   to the left of    2
10    7  to the right of   12
11    7  to the right of    9
12    7  to the right of    1
13    9   to the left of    4
14    9  to the right of    1
15    9   to the left of    7
16   11               of    8
17   11               of    5
18   12   to the left of    7
19   12   to the left of    2
20   12  to the right of    1