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

Input:
Product title: Magic: the Gathering - Keldon Megaliths - Future Sight - Foil
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 : Keldon Megaliths Color : Land Card Type : Land Card Text : Keldon Megaliths comes into play tapped. T Add R to your mana pool. Hellbent - 1R, T Keldon Megaliths deals 1 damage to target creature or player. Play this ability only if you have no cards in hand.
Product feature: A single individual card from the Magic: the Gathering (MTG) trading and collectible card game (TCG/CCG)., This is of Uncommon rarity., From the Future Sight set., You will receive the Foil version of this card.
Product price: $0.93
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