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: NFL Pittsburgh Steelers Tempered Glass Cutting Board with Display Stand
Product description: Featuring beautifully designed team logos and contemporary graphics, these Glass Cutting Boards are constructed from break-resistant tempered glass for durability. Perfect for slicing and serving your favorite fruits, vegetables, cheeses, meats, and pastries. Our Glass Cutting Board also includes a two-piece acrylic stand to prominently display your team spirit; this Cutting Board will enhance and accesorize the sports collection in any kitchen or counter top. BRA Free, Lead Free and safe to use. Dimensions - 14"(L) x10"(W) x 0.2"(H), Available for NFL, MLB & COLLEGES.
Product feature: Tempered glass cutting board with display stand, Durable, Break Resistent Glass, Designed with Your Favorite Team Logo, 2 Acrylic Display Stands included, BPA Free. Lead Free. Safe to Use
Product price: $12.99
Product brand: Duck House
Target attributes: Material
Answer: attribute: material
value: glass
source: product title
attribute: material
value: glass
source: product feature
attribute: material
value: glass
source: product description