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: Comp Dell H625/H825/S2825 HY Yellow Toner 2.5K
Product description: Dell Original Toner Cartridge - Yellow - Laser - High Yield - 2500 Pages - 1 / Pack
Product feature: Laser - High Yield - 2500 Pages - 1 / Pack
Product price: $17.99
Product brand: LD Products
Target attributes: Type
Answer: attribute: type
value: laser
source: product feature
attribute: type
value: laser
source: product description
attribute: type
value: toner
source: product title
attribute: type
value: toner cartridge
source: product description