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 VPCF132FX/B 16.4-Inch Laptop (Black)
Product description: Maximum performance and amazing HD entertainment on a top-notch 16.4"4 widescreen laptop with a backlit keyboard and integrated number pad. And with a Quad Core Intel Core i7 processor, dedicated NVIDIA GeForce 310M graphics, and a Blu-ray Disc drive19, you will experience the ultimate in smart performance and a razor-sharp picture with amazing depth and clarity
Product feature: Intel Core i7 - 740QM (1.73GHz) w/ Turbo Boost up to (2.93GHz), Microsoft Windows 7 Home Premium 64-bit, 16.4" (1600x900) widescreen LCD, 4GB of RAM & 500GB Serial ATA HDD, Blu-ray Disc optical drive & NVIDIA GeForce 310M graphics w/ 512MB VRAM
Product brand: Sony
Target attributes: Processor Speed
Answer: attribute: processor speed
value: None
source: None