Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Oneida Bristol Gourmet Collection 45-Piece Stainless Steel Set, Service for 8
Product description: Oneida Bristol Gourmet 45 pc stainless set - service for 8
Product feature: 45 pc - service for 4, Bristol pattern
Product brand: Oneida
Target attributes: Material
Answer: attribute: material
value: stainless
source: product description
attribute: material
value: stainless steel
source: product title