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: Lenovo 70F9001NUX ThinkServer RS140 70F9, 4 GB RAM, No HDD, Intel HD Graphics P4600, Business Black
Product description: Enjoy ultimate flexibility with the enterprise-class, 1U, single-socket thinkserver RS140 rack server. This compact form factor has a 16.2" deep chassis and features outstanding support for embedded graphics CPUs. How is Lenovo thinkserver RS140 versatile for business? it's loaded with features, gives you the choice of a dual-chassis, and has a slim, 1U design. The RS140 runs a range of operating systems, including client OS capability for retail applications. It's among the quietest models in the industry, and it features easy-to-use, industry-standard management tools.
Product feature: Powerful support for graphics-enabled CPU, Versatile for business, Built-in value, Smart and easy server management
Product brand: Lenovo
Target attributes: Design
Answer: attribute: design
value: rack server
source: product description