Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Inspiron i15RV-1334BLK Core i3-4010u Lap
Product description: The Dell Black 15.6" Inspiron i15RV-1334BLK Laptop with Intel Core i3-4010U Processor has everything you need to compute on the go. Microsoft Windows 8.1 lets you complete any task. Connect with friends and family on the built-in webcam. Pack hours of TV shows on the Inspiron 15s spacious hard drive or pop a movie in the DVD-RW drive. Either way, youll get lost in the 15.6" HD Truelife display. At home, connect to an HDMI-capable TV or monitor for an even bigger view. Starting at just over 1" thin, Inspiron 15 slips easily into a travel bag when youre on the move. Its textured lid and palm rest help you get a grip on things - slim and stylish.
Product feature: Windows 8.1, Intel Core i3-4010U Processor, 1.70GHz, 3MB Cache, 6GB DDR3 SDRAM system memory, 500GB SATA hard drive, Tray-loading DVD drive, 10/100 Ethernet, 802.11n Wireless LAN
Product brand: Dell
Target attributes: Weight
Answer: attribute: weight
value: None
source: None