I admit that the first time I tried this, the first five or six things I typed in were not even in Pandora's database. Typing in Nina Hagen was successful, but on the other hand I don't actually listen to Nina Hagen all that often. My best try so far has been Pentangle, as this brings up Pentangle, efforts by members of Pentangle, and all sorts of interesting other music that combines folk and jazz. The Pentangle "station" is also good for listening on headphones while I'm working at the library, which is about the only place I tune in to Pandora. Nina Hagen would not be very conducive to quiet reading of early twentieth-century periodicals. But perhaps I could try one of the 1920s jazz or blues greats and get something that would be more historically appropriate.
Pandora is currently expanding its database to include more Latin music, but hasn't yet really gone into Classical or World, which explains why my initial tries got nowhere.