Is the plane to the left of a cone?
No, the plane is to the right of a cone.
    src        edge_attr  dst
0     1   to the left of    6
1     1  to the right of    5
2     1  to the right of   17
3     2  to the right of   14
4     3  to the right of    9
5     3   to the left of   10
6     5   to the left of    1
7     6  to the right of    1
8     8  to the right of   16
9     8  to the right of   11
10    8  to the right of   12
11    9   to the left of    3
12    9   to the left of   10
13   10  to the right of    9
14   10  to the right of    3
15   11   to the left of    8
16   11   to the left of   12
17   12   to the left of    8
18   12  to the right of   11
19   14   to the left of    2
20   15  to the right of   16
21   16   to the left of   15
22   16   to the left of    8
23   17   to the left of    1