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: Goin' Coastal - Beach Greeting Card Assortment [AST90693] - 20 cards with full-color interiors and 22 designed envelopes
Product description: Be prepared with a greeting card at hand. Cards are printed on 100% recycled paper using soy-based inks
Product feature: 20 cards (1 each of 20 designs) & 22 envelopes per box, Designed envelopes for extra appeal, Packaged in a beautiful, convenient portfolio, Printed on recycled paper
Product brand: Leanin' Tree
Target attributes: Quantity
Answer: attribute: quantity
value: 20 cards
source: product feature
attribute: quantity
value: 20 cards
source: product title