user: Question: How many release dates are there for year of 1988 and additional rock band 3 features is None?
Columns: ['Song title', 'Artist', 'Year', 'Genre', 'Single / Pack name', 'Release date', 'Family Friendly', 'Additional Rock Band 3 Features']
Types: ['text', 'text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['" Fortunate Son "', 'Creedence Clearwater Revival', 1969.0, 'Southern Rock', 'Single', 'Nov.20,2007', 'Yes', 'None']
SQL:

assistant: SELECT COUNT("Release date") FROM "Table" WHERE "Year" = 1988.0 AND "Additional Rock Band 3 Features" = 'None';