Which side are the spectators on?
The spectators are on the left of the image.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of   13
2     0   to the left of    3
3     0   to the left of    5
4     0   to the left of   12
..  ...              ...  ...
62   12   to the left of   10
63   12   to the left of    1
64   12   to the left of    9
65   13  to the right of    4
66   13  to the right of    0

[67 rows x 3 columns]