Do you see an umbrella or a fence there?
No, there are no umbrellas or fences.
    src        edge_attr  dst
0     1   to the left of    3
1     1   to the left of    5
2     1   to the left of    6
3     2   to the left of    3
4     3  to the right of    1
5     3   to the left of    5
6     3  to the right of    2
7     4   to the left of    6
8     5  to the right of    1
9     5  to the right of    3
10    6  to the right of    1
11    6  to the right of    4