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: Sony VAIO(R) VPCSA3SGX/X 13.3" Notebook PC - Black
Product description: Lightweight and easy to handle at just 3.7 pounds with a thin 1" profile, the VAIO(R) S Series notebook is crafted for those on the move. Featuring 2nd generation Intel Core technology, hybrid graphics, optional dual-channel solid state drives, Blu-ray player, up to 8GB RAM and a durable magnesium alloy casing, the S Series notebook has everything it takes to get you through the most demanding of days - all in a thin-and-light 13.3" form factor. Plus a host of energy-saving features deliver up to 7 hours of standard battery life, and up to 14 hours of total combined battery life with the large capacity sheet battery (included) - helping to keep you unplugged longer. 13.3 LED Backlit Display (1600 x 900) Built-in HD web camera powered by Exmor sensor and microphone AMD Radeon HD 6630M Hybrid Graphics with 1GB of dedicated memory Intel High Definition Audio with Dolby Home Theater Technology v3 Blu-ray Reader and DVD Burner Drive Intel Centrino Advanced-N 6230 802.11 a/b/g/n Wireless LAN Intel Wireless Display Enabled (WiDi) - requires the purchase of the Netgear Push2TV TV Adapter for Intel Wireless Display PTV1000 (NTG PTV1000) Bluetooth Stereo A2DP (2.1 + EDR) 10/100/1000 Gigabit Ethernet LAN Multimedia Card Reader - MS Duo & SD media slot Biometric Fingerprint Sensor Trusted Platform Module (TCG ver. 1.2 certified) Backlit Keyboard & Touchpad (Gestures supported) Ports - 1 x USB 3.0, 2 x USB 2.0, Headphone Output, VGA, HDMI, RJ-45 Ethernet, Port Replicator Connector Dimensions (Approx.) - 13.04 (W) x 0.92 - 1.27 (D) x 8.84 (H) inches Weight (Approx.) - 3.65 pounds (with Internal Battery), 4.80 pounds (with Sheet Battery)
Product feature: Operating System: Genuine Windows 7 Professional with Service Pack 1 64-bit. Supplied Software: Microsoft Office Starter with reduced functionality versions of Word and Excel 6, VAIO Care, Media Gallery, PMB - VAIO Edition, Intel Core i7-2640M 2.80GHz Processor with Intel Turbo(R) Boost Technology up to 3.50GHz, Processor Cache: 4MB, 8GB DDR3 1333MHz RAM (8GB max.). Installed Memory 6GB (4GB onboard + 2GB), 500GB 7200RPM SATA Hard Drive
Product brand: Sony
Target attributes: Number of Cores
Answer: attribute: number of cores
value: None
source: None