Complex sentence: From its mountain headwaters near Telefomin, it travels north-west and leaves the mountains abruptly near Yapsei and goes into Indonesian Papua, before turning back north-east for the majority of its journey following the Great Depression.
Split into simpler sentences: From its mountain headwaters near Telefomin, it travels north-west and leaves the mountains abruptly near Yapsei. From here it flows into Indonesian Papua, before turning back north-east for the majority of its journey following the Great Depression.