Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Asus ASUSPRO E810-B0114 Desktop Computer - Intel Core i5 i5-4590T 2 GHz - Mini PC - Black - 4 GB RAM - 500 GB HDD - DVD-Writer - Intel HD Graphics 4600 - Windows 7 Professional 64-bit - Wireless LAN - E810-B0114
Product description: ASUS Desktops -- Most recommended Windows desktop brand Innovation, design and reliability are at the heart of all ASUS computers. Winning Readers' Choice for overall satisfaction for the second year in a row, and for the third successive year in the home category, is proof that ASUS is better at delivering what customers want than rival Windows desktop PC companies. As PCMag.com says*: If you want a Windows desktop PC, ASUS is the best choice. Bluetooth : No Brand Name : Asus Color : Black DVI : Yes DisplayPort : Yes Form Factor : Mini PC Graphics Controller Manufacturer : Intel Graphics Controller Model : HD Graphics 4600 Graphics Memory Accessibility : Shared Green Compliant : Yes Operating System Architecture : 64-bit Operating System : Windows 7 Professional Optical Drive Type : DVD-Writer Processor Manufacturer : Intel Processor Model : i5-4590T Processor Speed : 2 GHz Processor Type : Core i5 Product Family : ASUSPRO E810 Product Type : Desktop Computer Standard Memory : 4 GB Total Hard Drive Capacity : 500 GB Wireless LAN : Yes Controllers Controller Type: Serial ATA/600 Display & Graphics Graphics Controller Manufacturer: Intel Graphics Controller Model: HD Graphics 4600 Graphics Memory Accessibility: Shared Graphics Memory Technology:
Product feature: More for the money with this high quality Product, Offers premium quality at outstanding saving, Excellent product, 100% satisfaction
Product brand: Generic
Target attributes: Number of Cores
Answer: attribute: number of cores
value: None
source: None