Which side is the dispenser on?
The dispenser is on the left of the image.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of   12
2     0   to the left of    4
3     0   to the left of   14
4     0   to the left of   17
..  ...              ...  ...
68   16  to the right of    5
69   16  to the right of    0
70   17   to the left of   14
71   17  to the right of    0
72   17  to the right of    5

[73 rows x 3 columns]