when a river preposition automobile a cube preposition , ergonal predator occurs
if strickle occurs then smooth occurs. directional_preposition is not spatial_preposition. if indent occurs then hit occurs. biventricular_pacing is surgical_eps_procedure. atelic_directional_preposition is spatial_preposition. directional_preposition is spatial_preposition. biventricular_pacing is not surgical_eps_procedure. reverse is opposition. if rappel occurs then mountaineer occurs. if line_up occurs then wait occurs.