Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Art Impressions Maturing Front-N-Backs Cling Rubber Stamp, 7" by 4"
Product description: Art Impressions-Front N Backs Cling Rubber Stamp. Add wonderful images and phrases to cards and more with these repositionable cushioned stamps! With such a large variety of animated stamps you are sure to find the perfect match for every project! This 7x4 inch package contains Maturing: three cling rubber stamps. Made in USA.
Product feature: Art Impressions Front-N-Backs Cling Rubber Stamp 7"X4", This 5x4 inch package contains six rubber stamps, Made in USA
Product brand: Art Impressions
Target attributes: Material
Answer: attribute: material
value: rubber
source: product feature
attribute: material
value: rubber
source: product title
attribute: material
value: rubber
source: product description