Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Yu-Gi-Oh! - Gemini Scorpion (SOVR-EN085) - Stardust Overdrive - Unlimited Edition - Rare
Product description: Yu-Gi-Oh! is a strategic trading card game in two players Duel each other using a variety of Monster, Spell, and Trap Cards to defeat their opponent's monsters and be the first to drop the other's Life Points to 0. Card Name : Gemini Scorpion Card Type : Effect Monster Card Number : SOVR-EN085 Set : Stardust Overdrive Attack/Defense : 1600/400 Attribute : Earth Level : 4 Monster Type : Warrior Passcode : 91798373 Card Text : When this card is Normal or Special Summoned, you can Special Summon 1 Level 4 or lower Gemini Monster from your hand.
Product feature: A single individual card from the Yu-Gi-Oh! trading and collectible card game (TCG/CCG)., This is of Rare rarity., From the Stardust Overdrive set., You will receive the Unlimited Edition version of this card.
Product price: $0.49
Product brand: Yu-Gi-Oh!
Target attributes: Game
Answer: attribute: game
value: yu-gi-oh!
source: product brand
attribute: game
value: yu-gi-oh!
source: product feature
attribute: game
value: yu-gi-oh!
source: product title
attribute: game
value: yu-gi-oh!
source: product description