Complex sentence: When Ernst Manker studied the forest Sami during the first decade of the 20th century, almost every viste had been abandoned for abodes that looked more like regular Swedish places of residence: houses and farms.
Split into simpler sentences: When Ernst Manker studied the forest Sami during the first decade of the 20th century, almost every viste had been abandoned. Forest Sami abodes now looked more like regular Swedish places of residence: houses and farms.