Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Sdeals QuadCore A33 Google Android 4.4 KitKat Tablet PC with Touchscreen, 8 gb inner storage Bluetooth, HD 0.3MP Dual Camera with flash, Google Play Pre-loaded, 3D-Game Supported (PINK)
Product feature: SDEALS SD-7A23Q8 easy to use tablet with 4.4.2 KitKat OS android version comes in three different colors, 7" TFT LCD 800*480 Pixels resolution on Screen with dual Front/Rear Cameras 0.3MP+Flash each, Powerful A33 Quad core processor for Web browsing, music, video and running games smoothly, Battery Type: 2800mAh rechargeable battery Run Time (Up to): 4 to 6 hours Power Device Type: AC Adapter Voltage Required: AC 100-240V, DC 5V 2A, 8GB inner storage to download lots of Apps and media so you never run out of entertainment, Powerful A33 Quad core processor, 2800mAh rechargeable battery Run Time (Up to): 4 to 6 hours, 8GB inner storage, 4.4.2 KitKat OS android, Box includes Tablet,Charger,USB Cable,OTG Cable and silicon Case
Product brand: SDEALS
Target attributes: Screen Size
Answer: attribute: screen size
value: None
source: None