protecting a inanimate place has a uncertain concrete on that inanimate place 's elbow
right_elbow is not cubital_joint. detritus is inanimate_object. right_cubital_joint is not elbow. right_cubital_joint is elbow. place_occupied_by_humans is inanimate_object. right_elbow is cubital_joint. nest is not gun_emplacement. gun_emplacement is not emplacement. nest is gun_emplacement. gun_emplacement is emplacement.