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: Supermicro Super Server Barebone System Components (SYS-5018A-MHN4)
Product description: Super micro Super Server SYS-5018A-MHN4 Atom C2758 200W 1U Rack mount Server Barebones System (Black)
Product feature: Intel Atom processor C2758, Sock, FCBGA 1283, 20W 8-Core, 4x 3.5" SATA HDD Bays, 1x PCI-E 2.0 x8 slot, Up to 64GB DDR3 1600MHz ECC or non-ECC UDIMM in 4 DIMM sockets, 200W Low-noise power supply w/ PFC
Product price: $8.94
Product brand: Supermicro
Target attributes: Power Supply
Answer: attribute: power supply
value: 200w
source: product description
attribute: power supply
value: 200w
source: product feature