sentences: warm water contains less dissolved oxygen than cold water
docs: liquid_water has little_oxygen_in cold_air has less_water if_water is very_cold_then_ice. water has oxygen water is compound_of_hydrogen_and_oxygen. freshwater has less_salt_than_seawater water has oxygen_and_hydrogen cold_water is not_hot_water. ice is colder_than_liquid_water. oxygen is piece_of_water_molecule.