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: Pewter Triquetra Celtic Triangle Irish Knot Christmas Ornament and Holiday Decoration
Product description: This Triquetra Ornament is hand cast and hand finished in solid Pewter with a shiny finish resembling antiqued silver. This unique Holiday Ornament comes with a Red Satin Ribbon ready to hang from your Christmas Tree or as a Holiday Decoration for your home. We use Fine American Pewter that is lead free and Made in the USA. Our Pewter Ornaments make terrific gifts for family, friends, business associates and of course, your home. We hope you and your loved ones enjoy this keepsake for years to come!
Product feature: Fine American Pewter - Lead Free, Made in the USA, Hand cast and Hand Finished, 1.15 x 1.75 inches with Shiny, High Polish Finish, Unique Christmas Ornament or Hanging Decoration Year 'Round!, Ready to hang on a Red Satin Ribbon
Product price: $8.95
Product brand: Trilogy Jewelry
Target attributes: Material
Answer: attribute: material
value: pewter
source: product feature
attribute: material
value: pewter
source: product description
attribute: material
value: pewter
source: product title