sentences: a sharp object can be used for protection
docs: protective_covering is device. pins_and_needles is sharp_objects. shielding is protection. blade is sharp_thing. ear_protection_gear is physical_impact_buffer. pressure_sensitive_detonating_weapon is weapon. covering is protection. protecting_artificial_tangible_object is protecting_partially_tangible. sharp_knives is safe_knives. dart is sharp_object.