Complex sentence: Donohue and colleagues (2002) conclude that it is definitely not a Kwerba language, as it had been classified by Wurm (1975), and they did not notice connections to any other language family.
Split into simpler sentences: Donohue and colleagues (2002) conclude that it definitely is not a Kwerba language, as it had been classified by Wurm (1975). They did not notice connections to any other language family.