user: Question: How many premio are there when "Artist of the Year" was the categoria?
Columns: ['Año', 'Trabajo nominado', 'Premio', 'Categoría', 'Country', 'Resultado']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2009.0, 'Adammo', 'MTV Latin America', 'Revelation Artist', 'Colombia', 'Nominate']
SQL:

assistant: SELECT COUNT("Premio") FROM "Table" WHERE "Categoría" = 'Artist of the Year';