Do you think the glass is clean or dirty?
The glass is clean.
     src        edge_attr  dst
0      0   to the left of   15
1      0   to the left of   14
2      0   to the left of   23
3      0   to the left of   20
4      0   to the left of    7
..   ...              ...  ...
142   24   to the left of   25
143   25  to the right of   24
144   25  to the right of   11
145   25   to the left of   23
146   25  to the right of   12

[147 rows x 3 columns]