Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: HP Pavilion xt125 Laptop (1.6-GHz Celeron-M, 256 MB RAM, 20 GB Hard Drive)
Product feature: Hard Drive: 20 GB, Operating System: Windows XP Home Edition, Bundled Software: Microsoft Outlook Express 6.0,Microsoft Fax Services,Microsoft IE 6.0,Microsoft Firewall
Product brand: HP
Target attributes: Refresh Rate
Answer: attribute: refresh rate
value: None
source: None