Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Family Tradition Boxed Christmas Cards - Set of 15
Product description: Box of 15 Christmas cards and 16 deluxe gold foil lined envelopes. Cards measure 4 1/2"x6 1/4" when folded. All of our Christmas cards are proudly printed in the U.S.A. on durable card stock and neatly packaged in an attractive red box. The artist for this card is Geno People. Inside greeting:May all of your days be filled with the joy of Christmas!
Product feature: Box of 15 Christmas Cards / 16 Deluxe Gold Foil Lined Envelopes., Proudly made in the U.S.A. on durable card stock., Christmas cards measure 4 1/2"x6 1/4" folded., Packed in an attractive red box., Inside greeting: May all of your days be filled with the joy of Christmas!
Product price: $12.95
Product brand: Vermont Christmas Company
Target attributes: Quantity
Answer: attribute: quantity
value: box of 15
source: product feature
attribute: quantity
value: box of 15 christmas cards
source: product description
attribute: quantity
value: set of 15
source: product title