What is the first expansion to World of Warcraft?
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The player versus player mechanic is a key element of World of Warcraft.
The player versus player is a type of play in World of Warcraft .
What is the first expansion to World of Warcraft?</s>The [unused1]player versus player                [unused2] mechanic is a key element of World of Warcraft.
What is the first expansion to World of Warcraft?</s>The player versus player mechanic is a key element of World of Warcraft.
What is the first expansion to World of Warcraft?</s>The [unused1]player versus player                [unused2] is a type of play in World of Warcraft .
What is the first expansion to World of Warcraft?</s>The player versus player is a type of play in World of Warcraft .
What is the first expansion to World of Warcraft?</s>[unused1]player versus player[unused2],0,[unused1]player versus player[unused2],[unused1]player versus player[unused2],0,World of Warcraft,World of Warcraft,game mechanics,[unused1]player versus player[unused2],World of Warcraft,0,World of Warcraft
What is the first expansion to World of Warcraft?</s>player versus player,0,player versus player,player versus player,0,World of Warcraft,World of Warcraft,game mechanics,player versus player,World of Warcraft,0,World of Warcraft