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: Intel Core 2 Duo E6300 1.86GHz 2MB CPU Processor LGA775 SL9SA SL9TA SLA2L SLA5E
Product description: Condition Notes: Used Intel Core 2 Duo E6300 CPU Processor Model: SL9SA Socket: LGA775 Cores: 2 Frequency: 1.86GHz
Product feature: Intel Core 2 Duo E6300 CPU Processor, Model: SL9SA, Socket: LGA775, Cores: 2, Frequency: 1.86GHz
Product brand: Intel
Target attributes: FSB Speed
Answer: attribute: fsb speed
value: None
source: None