Complex sentence: The vascular organ of lamina terminalis (or supraoptic crest) is one of the three sensory circumventricular organs of the brain, other two being the subfornical organ and the area postrema in the brainstem.
Split into simpler sentences: The vascular organ of lamina terminalis (or supraoptic crest) is one of the circumventricular organs of the brain. Other circumventricular organs are the subfornical organ and the area postrema in the brainstem.