Complex sentence: The pinworm (genus "Enterobius"), also known as threadworm (in the United Kingdom and Australia) or seatworm, is a nematode (roundworm) and a common intestinal parasite, especially in humans.
Split into simpler sentences: The pinworm (genus "Enterobius"), also known as threadworm (in the United Kingdom and Australia) or seatworm, is a parasitic worm. It is a nematode (roundworm) and a common intestinal parasite, especially in humans.