Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Sony VAIO VGN-FS750P/W 15.4" Laptop (Intel Pentium M Processor 750, 512 MB RAM, 100 GB Hard Drive, DVD+R Dbl Layer/DVD+/-RW Drive)
Product description: Includes: lithium-ion battery, AC adapter, Microsoft Windows XP Professional Edition with SP2, Adobe Photoshop Album Starter Edition, Quicken 2005 New User Edition, WinDVD, Works 8.0, Office 2003 60-day trial (Student/Teacher Edition), Roxio DigitalMedia SE, & more. Sony Vaio FS VGN-FS750P/W Notebook Computer - This laptop computer combines advanced multimedia features with the tools you need for everyday computing on the road. With the 15.4" widescreen LCD, you can enjoy DVD movies the way they were meant to be seen. Or make your own DVD creations with the built-in DVD writer and included original Sony software. 100GB 4200RPM HDD 512MB of PC3200 DDR2 SDRAM (expandable up to 2GB) Intel Graphics Media Accelerator 900 with 128MB of shared memory (memory is shared with the main system's RAM) Double Layer DVD Writer - (write speeds) up to 2.4x Double Layer DVD+R, 8x DVD-R, 8x DVD+R, 4x DVD-RW, 4x DVD+RW, 24x CD-R, & 10x CD-RW Double Layer DVD Writer - (read speeds) up to 8x DVD-ROM & 24x CD-ROM 56k v.90 Data/Fax Modem Built-in Stereo Speakers Ports - 10/100 Ethernet, VGA Out, 3 USB 2.0, 4-pin Firewire, & Printer Built-in Memory Stick(R) Media Slot - supports Memory Stick, Memory Stick(R) PRO, & Memory Stick(R) DUO media 1 PCMCIA Type I/II Card Slot with CardBus support External Color - White
Product feature: Intel Pentium M Processor 750 (1.86 GHz), 2MB L2 Cache, Built-in 802.11b/g Wi-Fi Wireless Networking Adapter, 15.4 Widescreen LCD, 1280x800 Native Resolution
Product brand: Sony
Target attributes: Number of Cores
Answer: attribute: number of cores
value: None
source: None