. "System"@en . . "Universal Building Set"@en . . "6 Basic Set was a Universal Building Set released in 1973. It contained 338 pieces."@en . "yes"@en . "6"^^ . "1973"^^ . . . "yes"@en . "Basic Set"@en . . . . "6 Basic Set was a Universal Building Set released in 1973. It contained 338 pieces."@en . . "yes"@en . "6 Basic Set"@en . "338"^^ .