Table: ebook_readers_3
Columns: maker
model
intro_year
screen_size_inch
screen_type
weight
screen_pixels
hours_reading
touch_screen
wireless_network
internal_storage
card_reader_slot

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?
SQL: SELECT "weight" FROM ebook_readers_3 WHERE "internal_storage" = '16-64 gb' AND "wireless_network" = 'wi-fi, 3g'

Question: Which wireless network did LCD displays with 4 GB of internal storage use?
SQL: SELECT "wireless_network" FROM ebook_readers_3 WHERE "screen_type" = 'lcd' AND "internal_storage" = '4 gb'