Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: 50 Tan A6 Envelopes - 6.5" x 4.75" - Square Flap
Product description: 50 A6 size envelopes for only $7.94. 6.5" x 7.75" envelopes in 60lb text paper stock. Booklet style square flap. Perfect for any Note Card Caf note card product or 4" x 6" photo card.
Product feature: A6 Size Envelope (4 3/4" x 6 1/2"), 60lb Text Paper Stock, Booklet Style Square Flap, Standard Glue Seal
Product brand: Note Card Cafe
Target attributes: Material
Answer: attribute: material
value: paper
source: product feature
attribute: material
value: a6
source: product description
attribute: material
value: a6
source: product title
attribute: material
value: a6
source: product feature
attribute: material
value: paper
source: product description