user: ### NOW ANSWER:
Question: which channels had spokesperson Arina Sharapova and No Dual Commentator
Columns: ['Year(s)', 'Commentator', 'Dual Commentator', 'Spokesperson', 'Channel']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1994.0, 'Vadim Dolgachyov', 'No Dual Commentator', 'Arina Sharapova', 'Russia 1']
SQL:

assistant: SELECT "Channel" FROM "Table" WHERE "Spokesperson" = 'Arina Sharapova' AND "Dual Commentator" = 'No Dual Commentator';