Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Aspire V3-731-B9606G50Makk 17.3" LED Notebook - Intel Pentium B960 2.20 GHz
Product description: 2.20GHz Intel Pentium B960 Dual-Core Processor Graphics Media Accelerator HD 6GB RAM 500GB Hard Drive 5-In-1 Card Reader WiFi DVD-Writer 6-Cell Battery Windows 8
Product feature: 2.20GHz Intel Pentium B960 Dual-Core Processor, 6GB DDR3 Memory / 500GB Hard Drive, Graphics Media Accelerator HD, Windows 8
Product brand: Acer
Target attributes: Processor Speed
Answer: attribute: processor speed
value: 2.20ghz
source: product feature
attribute: processor speed
value: 2.20ghz
source: product description
attribute: processor speed
value: 2.20 ghz
source: product title