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: Magic: the Gathering - Force of Nature - Unlimited
Product description: Magic: the Gathering is a collectible card game created by Richard Garfield. In Magic, you play the role of a planeswalker who fights other planeswalkers for glory, knowledge, and conquest. Your deck of cards represents all the weapons in your arsenal. It contains the spells you know and the creatures you can summon to fight for you. Card Name : Force of Nature Cost : 2GGGG Color : Green Card Type : Creature - Elemental Power/Toughness : 8/8 Card Text : Trample (If this creature would deal enough combat damage to its blockers to destroy them, you may have it deal the rest of its damage to defending player.) At the beginning of your upkeep, Force of Nature deals 8 damage to you unless you pay GGGG.
Product feature: A single individual card from the Magic: the Gathering (MTG) trading and collectible card game (TCG/CCG)., This is of Rare rarity., From the Unlimited set.
Product price: $84.95
Product brand: Magic: The Gathering
Target attributes: Game
Answer: attribute: game
value: planeswalker
source: product description
attribute: game
value: magic: the gathering
source: product brand
attribute: game
value: magic: the gathering
source: product description
attribute: game
value: planeswalkers
source: product description
attribute: game
value: magic: the gathering
source: product title
attribute: game
value: magic: the gathering
source: product feature