Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Sony VAIO T Series SVT131190X 13.3-Inch Ultrabook (Silver Mist) / 3rd gen Intel® Core™ i5-3317U / 4G / 500GB + 32GB MLC hybrid hard drive with RAID 0 / Windows 7
Product description: Product: US-SVT131190X-LBOM Component: Silver Mist Component: No engraving Component: No Fresh Start Component: Microsoft Office 2010 Starter (Click More Info for details.) Component: Internal lithium polymer battery (4050mAh) Component: 3rd gen Intel Core i5-3317U (1.70GHz / 2.60GHz with Turbo Boost) Component: 4GB (4GB fixed onboard + 1 open slot) DDR3-1333Mhz Component: Genuine Windows 7 Home Premium 64-bit Component: Intel HD Graphics 4000 Component: 13.3" LED backlit display (1366 x 768) Component: Kaspersky Internet Security (30-day trial) Component: 500GB (5400rpm) + 32GB MLC hybrid hard drive with RAID 0
Product feature: 3rd gen Intel Core i5-3317U (1.70GHz / 2.60GHz with Turbo Boost); Genuine Windows 7 Home Premium 64-bit, 4GB (4GB fixed onboard + 1 open slot) DDR3-1333Mhz., 500GB (5400rpm) + 32GB MLC hybrid hard drive with RAID 0, 13.3" LED backlit display (1366 x 768); Intel HD Graphics 4000, Internal lithium polymer battery (4050mAh)
Product brand: Sony
Target attributes: Number of Cores
Answer: attribute: number of cores
value: None
source: None