Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Hillman Fastener Corp #10 item # 830556 Stainless Steel Flat Washer qty 100
Product description: Commercial flat washer, stainless steel finish. Pack of 100. #10 Stainless steel Commercial flat washer 100 Pack.
Product feature: #10, Stainless steel, Commercial flat washer, 100 Pack.
Product price: $5.11
Product brand: Hillman Fasteners
Target attributes: Material
Answer: attribute: material
value: stainless steel
source: product feature
attribute: material
value: stainless steel
source: product description
attribute: material
value: stainless steel flat washer
source: product title
attribute: material
value: washer, stainless steel
source: product description