the third shade purpose is placed in a vaccum
northern_three_striped_opossum is not mammal. sun_visor is shade. third_base is position. shade is protective_covering. third_thoracic_vertebra is not dorsal_vertebra. shade is not semidarkness. third_lumbar_vertebra is lumbar_vertebra. shade is semidarkness. third_base is not position. third_thoracic_vertebra is dorsal_vertebra.