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: HP ProBook 6560b - 15.6" - Core i5 2410M - Windows 7 Professional 64-bit - 4 GB RAM - 320 GB HDD -
Product description: Off lease item
Product feature: 14 in HD anti-glare LED backlight display; delivers amazing picture quality even under very bright lighting, Core i5-2410M 2.3GHz Processor, 8GB DDR3 Memory; smooth operations to provide better multitasking;320GB Hard Drive;, Integrated Wireless LAN; allows you to connect to the Internet at any time;DVD Super Multi Dual Layer Burner; burns data on DVD discs, Windows 7 Professional operating system
Product brand: HP
Target attributes: Weight
Answer: attribute: weight
value: None
source: None