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: International Silver Flatware, Alliance Frost 20 Piece Stainless Steel Set
Product description: A stylish table takes shape with Alliance Frost place settings. Matte detail in the handles creates a striking geometric design in the casual flatware set from International Silver.
Product feature: 18/0 stainless steel, Dishwasher safe, Includes 4 of each of the following: salad forks, dinner forks, dinner knives, soup spoons and teaspoons
Product brand: Lifetime Brands
Target attributes: Material
Answer: attribute: material
value: stainless steel
source: product feature
attribute: material
value: stainless steel
source: product title