The use of copolymers obtainable by the radically initiated polymerization of A) 50 to 99. According to the rules, conversion processing is executed to convert data in the data format of the input system into data in the data format of the output system. A vent member is movable relative to the vent opening for controlling a flow of inflation fluid through the vent opening. The feature-related data are stored by an information unit outside the vehicle.