heat is taken away from a container of water
heat_of_solution is not heat. water_back is water_heater. heat_of_solution is heat. hot_water_bottle is not receptacle. water_back is not water_heater. hotspring is natural_source_of_hot_water. hot_water_bottle is receptacle. watering_can is not container. hotspring is not natural_source_of_hot_water. watering_can is container.