Putting it together, maybe they're looking for an exclusive story or event from 1978 in Denmark involving Brigitte and Rikke? Maybe two Danish women? Or perhaps it's a product, like a car model (VW Lupo, but that's later)? Or a boat? Since "1978L" could be a liter measurement, maybe a product from 1978. Alternatively, maybe it's a Danish event or a historical occurrence.

Alternatively, maybe the user is referring to a Danish song or a film? But "1978L" is unclear. Alternatively, maybe it's a typo for "1978 L" (liter) like a car's engine capacity. There's a car model from Denmark? Not sure. Alternatively, it could be a boat or a vehicle.

Alternatively, maybe the user is referring to a Danish car model from 1978 with a 1.6L engine? For example, the DKW or DAF cars? Or perhaps a specific model that's rare, leading to an exclusive text about it.