Complex sentence: The gender assignation of non-sex-differentiable animals in masculine and feminine is complex; in general, those of no importance to the Kets are feminine, while objects of importance (e.g. fish, wood) are masculine.
Split into simpler sentences: The gender assignation of non-sex-differentiable animals in masculine and feminine is complex; in general, those of no importance to the Kets are feminine. Objects of importance (e.g. fish, wood) are masculine.