Progressive rock achieved popularity in Continental Europe more quickly than it did in the US. Italy remained generally uninterested in rock music until the strong Italian progressive rock scene developed in the early 1970s. Few of the European groups were successful outside of their own countries, with the exceptions of Dutch bands like Focus and Golden Earring who wrote English-language lyrics, and the Italians Le Orme and PFM, whose English lyrics were written by Peter Hammill and Peter Sinfield, respectively. Some European bands played in a style derivative of English bands. The "Kosmische music" scene in Germany came to be labelled as "krautrock" internationally and is variously seen as part of the progressive rock genre or an entirely distinct phenomenon. Krautrock bands such as Can, which included two members who had studied under Karlheinz Stockhausen, tended to be more strongly influenced by 20th-century classical music than the British prog bands, whose musical vocabulary leaned more towards the Romantic era. Many of these groups were very influential even among bands that had little enthusiasm for the symphonic variety of progressive rock.