user: Question: What is the weight of the display that has an internal storage of 16-64 GB and uses a Wi-Fi, 3G wireless network?
Columns: ['Maker', 'Model', 'Intro year', 'Screen size (inch)', 'Screen type', 'Weight', 'Screen pixels', 'Hours reading', 'Touch screen', 'Wireless network', 'Internal storage', 'Card reader slot']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Aluratek', 'Libre Touch eBook Reader', '2011', '7', 'LCD', 'g (oz)', '480 × 800', '8', 'Yes', 'Yes, Wi-Fi', '4 GB', 'microSD']
SQL:

assistant: SELECT "Weight" FROM "Table" WHERE "Internal storage" = '16-64 GB' AND "Wireless network" = 'Wi-Fi, 3G';