Are there airplanes in the sky?
No, there is a bird in the sky.
    src        edge_attr  dst
0     1  to the right of    6
1     3               in    0
2     3               in    2
3     3  to the right of    5
4     3  to the right of    6
5     4               of    3
6     4  to the right of    6
7     4  to the right of    5
8     5   to the left of    3
9     5   to the left of    4
10    6   to the left of    1
11    6   to the left of    4
12    6   to the left of    3
13   11               in    0