"rol" . . "The category that the New and Old entities fit into as a result of the Function they serve. What gas replaced Hydrogen as a safer medium for use in balloons on account it does not burn?"@en . "JKR" . "6795"^^ . "The category that the New and Old entities fit into as a result of the Function they serve.\nWhat gas replaced Hydrogen as a safer medium for use in balloons on account it does not burn? "^^ . . . "2004-07-09T11:42:28+02:00"^^ . "Role" . "Role"^^ . . . . "The category that the New and Old entities fit into as a result of the Function they serve. What gas replaced Hydrogen as a safer medium for use in balloons on account it does not burn?"@en . . "Core" . "Core"^^ . "Role" . . . . . . .