Complex sentence: In the fictional Star Trek universe, Pah Wraiths (also spelled Pagh Wraiths, Bajoran for Soul Wraiths) are evil Bajoran Prophets, non-corporeal life-forms, who were expelled from the Bajoran wormhole and are imprisoned in the Bajoran Fire Caves on the planet Bajor.
Split into simpler sentences: In the fictional Star Trek universe, Pah Wraiths (also spelled Pagh Wraiths, Bajoran for Soul Wraiths) are evil Bajoran Prophets. Non-corporeal life-forms, they were expelled from the Bajoran wormhole and imprisoned in the Bajoran Fire Caves on the planet Bajor.