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: CakeSupplyShop Packaged CKI991 - 100 Bright and Vivid Silky Super Silver Cupcake Liners Standard Baking Cups
Product description: 100 Standard Graduation Baking Cups. Grease Resistant.
Product feature: Standard Baking Cups, 100 Count, Superior Quality Shinny Silver
Product price: $9.99
Product brand: CakeSupplyShop
Target attributes: Type
Answer: attribute: type
value: cupcake liners
source: product title
attribute: type
value: baking cups
source: product description
attribute: type
value: baking cups
source: product title
attribute: type
value: baking cups
source: product feature