What is in the sky?
The clouds are in the sky.
    src        edge_attr  dst
0     0   to the left of   15
1     2   to the left of   20
2     2  to the right of   16
3     2   to the left of    4
4     2   to the left of   21
..  ...              ...  ...
87   26  to the right of   11
88   26   to the left of   21
89   26       covered by    7
90   26  to the right of   16
91   28  to the right of   14

[92 rows x 3 columns]