Are the glasses black?
Yes, the glasses are black.
    src        edge_attr  dst
0     0   to the left of   17
1     0   to the left of   16
2     1   to the left of   14
3     1  to the right of   15
4     1   to the left of    8
..  ...              ...  ...
89   17  to the right of    0
90   17   to the left of    7
91   17  to the right of    3
92   17   to the left of   10
93   17   to the left of    8

[94 rows x 3 columns]