Is the clear cup to the left of the container full or empty?
The cup is empty.
   src        edge_attr  dst
0    0               in    2
1    0     reflected in    3
2    0   to the left of    5
3    2   to the left of    5
4    3               on    1
5    4               on    1
6    5  to the right of    2
7    5  to the right of    0
8    6               of    0