"\"Greg's guitar\" is a standard acoustic guitar that belongs to Greg Universe. It made its first appearance in the episode \"House Guest\". Greg used it in songs such as \"Wailing Stone\"."@en . "\"House Guest\""@en . "Greg's Guitar"@en . "\"Greg's guitar\" is a standard acoustic guitar that belongs to Greg Universe. It made its first appearance in the episode \"House Guest\". Greg used it in songs such as \"Wailing Stone\"."@en . . "Greg's Guitar"@en . "Musical instrument"@en . "\"Shirt Club\""@en . . . .