user: Question: How many times was the reader's vote na and the lifetime achievement na?
Columns: ['Year', 'Best teenage/Young Adult', "Reader's Vote", 'Best Non-Fiction', 'Lifetime Achievement']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1996.0, 'NA', 'NA', 'NA', 'Jon Cleary']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Reader's Vote" = 'na' AND "Lifetime Achievement" = 'na';