On which side is the dispenser?
The dispenser is on the left of the image.
     src        edge_attr  dst
0      0   to the left of   15
1      0  to the right of   27
2      0  to the right of   21
3      0  to the right of    9
4      0   to the left of    6
..   ...              ...  ...
211   31   to the left of    9
212   31   to the left of   24
213   31   to the left of   21
214   31   to the left of   27
215   31   to the left of   26

[216 rows x 3 columns]