an animal requires oxygen to breathe
mammal is air_breathing_vertebrate. herd_animal is not air_breathing_vertebrate. mammal is not air_breathing_vertebrate. herd_animal is air_breathing_vertebrate. all_mammals_breathe_air_and has lungs oxygen is oxygen. all_mammals_breathe_air_and has not lungs humans_must has oxygen_to_remain_conscious air has oxygen holding_one's_breath is action_performed_by_animals.