user: Question: Name the size of the screen that came out in 2006 and is iLiad
Columns: ['Maker', 'Model', 'Intro year', 'Screen size (inch)', 'Self-lit', 'Screen type', 'Screen pixels']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Amazon.com', 'Kindle Touch 3G', '2011', '6', 'no', 'eInk Pearl', '600 × 800']
SQL:

assistant: SELECT "Screen size (inch)" FROM "Table" WHERE "Intro year" = '2006' AND "Model" = 'iLiad';