Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Spawn manga curse action figure manga series 9
Product description: 1997 - McFarlane Toys - Item #MCU - Vintage 16 Years Old - Manga Spawn - Series 9 - Manga Curse Ultra-Action Figure - Cybernetic Arm Shoots Missile / Has Whipping Action - Bottom of Bubble is Dented - Toy is Pristine - Out of Production - New - Mint Figure - Rare - Limited Edition - Collectible
Product feature: 1997 - McFarlane Toys - Item #MCU - Vintage 16 Years Olds, Manga Spawn - Series 9 - Manga Curse Ultra-Action Figure, Cybernetic Arm Shoots Missile / Has Whipping Action, Out of Production - Bottom of Bubble is Dented, New - Mint - Rare - Limmited Edition - Collectible
Product price: $9.97
Product brand: Spawn
Target attributes: Minimum Age
Answer: attribute: minimum age
value: 16 years
source: product description
attribute: minimum age
value: 16 years
source: product feature