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: Microtel Computer AM8011 Liquid Cooling Gaming PC Computer with 4.2GHz Intel i7 7700K, 16GB DDR4, 2TB 7200RPM, 240GB SSD III, 24X DVD-RW, Nvidia Geforce 1060 GTX 6GB Video, 800W PS, Card Reader, WiFi
Product description: Intel Core i7-7700K Kaby Lake Quad-Core 4.2 GHz LGA 1151 91W Desktop Processor. Microsoft Windows 10 Full Version CD 64 bit. 16GB DDR4 Memory. 2TB Hard Drive 7200RPM. 24X DVDRW drive. Nvidia Geforce 1060 GTX 6GB GDDR5 Video Card. 800Watt PS. Card Reader. 10/100/1000 Network LAN 6 Channel 3D Premium Surround Sound. Six USB 2.0 Ports (2 front-mounted). USB Multimedia Keyboard. USB Optical Mouse w/wheel. Audio Port (Line-in, Line-out, Mic-in). Steel Case with see-through window. Additional software includes: OpenOffice Suite for word processing, spreadsheet calculations, creating presentations, drawing and image processing. OpenOffice Suite is compatible with most Microsoft Word, Excel & PowerPoint documents. Customer Service Toll Free 888-508-8898.
Product feature: Intel Core i7-7700K Kaby Lake Quad-Core 4.2 GHz LGA 1151 91W Desktop Processor, 16GB DDR4 RAM, z170 sli Plus, 2TB 7200RPM Hard Drive + 240GB SSD III, Nvidia Geforce 1060 GTX 6GB GDDR5 Video Card, Microsoft Windows 10 Full Version CD 64 bit
Product brand: Microtel Computer
Target attributes: Number of Cores
Answer: attribute: number of cores
value: quad-core
source: product description
attribute: number of cores
value: quad-core
source: product feature