An advertisement is selected based on a demographic profile that is determined based on a second set of categories of broadcasted programs. An airbag in a folded state is accommodated around an inflator of an airbag device, and a gas rectifying member for guiding gas is disposed between the airbag and the inflator surrounded by the airbag. In one embodiment, the above problem is solved by preparing a solid memory having a superlattice structure of thin films including Ge and thin films including Sb. The device can be employed to both track the individual vehicle participants in a race and also to register the participants in the race.