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: Leifheit Pro Line Stainless Steel Ice Cream Scoop
Product description: Proline ice cream scoop is sturdy enough to use on all ice creams and other deserts. The soft edges add to its sleek design.
Product feature: Sturdy Scoop, Soft edges, Sleek ergonomic design, Stainless steel construction, Dishwasher safe
Product brand: Leifheit
Target attributes: Material
Answer: attribute: material
value: stainless steel
source: product feature
attribute: material
value: stainless steel
source: product title