prison island

Deductions

• prison island is for example Robben Island ⇐ (Robben Island is a prison island), (is a is inverse of is for example)
• prison island is subclass of geographical feature ⇐ (prison island is subclass of landform), (landform is subclass of geographical feature), (is subclass of is a transitive relation)
• prison island is subclass of geomorphological unit ⇐ (prison island is subclass of island), (island is subclass of geomorphological unit), (is subclass of is a transitive relation)
• prison island is subclass of natural geographic object ⇐ (prison island is subclass of island), (island is subclass of natural geographic object), (is subclass of is a transitive relation)
• prison island is subclass of landform ⇐ (prison island is subclass of island), (island is subclass of landform), (is subclass of is a transitive relation)