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: Dell Optiplex Windows 10 Pro, Intel Core 2 Duo CPU E7500 @ 2.93 GHz, New 4 GB Memory, 160 GB HDD, DVD/CD - (Certified Reconditioned)
Product feature: MS WINDOWS 10 PROFESSIONAL., INTEL CORE 2 DUO CPU E7500 @ 2.93Ghz - New 4 GB Memory - 160 GB HDD., DVD/CD. New Power Cord., This certified reconditioned product is tested and certified by the manufacturer or by a third-party seller to look and work like new, with some signs of wear., The reconditioning process includes functionality testing, inspection and repackaging!
Product brand: Dell
Target attributes: Processor Brand
Answer: attribute: processor brand
value: intel core
source: product title
attribute: processor brand
value: intel core
source: product feature