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: Dell Inspiron 15 I15-156B 15.6-Inch Notebook PC - Pacific Blue
Product feature: 15.6-Inch laptop. Windows Vista Home Premium, Up to Intel Core2 Duo processors, 3 GB DDR2 SDRAM, 160 GB Hard Drive, 8 hours and 7 minutes of battery life with the 6-cell battery.
Product price: $659.00
Product brand: Dell
Target attributes: Refresh Rate
Answer: attribute: refresh rate
value: None
source: None