sentences: opposite are made of ball cooling
docs: cooling_water is cooling_process. cooling_tower is unnatural_thing. cooler is cooling_device. all_things has opposite air_cooling_device is cooling_device. warm_and_cool is opposite_descriptions_of_temperature. cooling_device is non_agentive_artifact. opposites is two_things. cooling_air is cooling_process. hot_and_cold is opposites.