Complex sentence: His parents had recently moved there In his biography of Lorre, Friedemann Beyer states that Lorre's family were outsiders in Rózsahegy as they, who had only arrived there very recently, were German-speaking Jews in a majority Slovak town.
Split into simpler sentences: His parents had recently moved there Friedemann Beyer states in his biography of Lorre that Lorre's family were outsiders in Rózsahegy as they had only arrived there very recently. They were German-speaking Jews in a majority Slovak town.