sentences: photosynthesis is a kind of chemical process
docs: photosynthesis is process. photosynthesis is synthesis. general_photosynthesis is physiological_function. photosynthesis is photo_chemical_process. biochemical_process is chemical_process. photosynthesis_in_plants is physiological_process. photosynthesis is chemical_process. general_photosynthesis is biochemical_synthesis. photosynthesis is process_by_which_leaf_makes_food. general_photosynthesis is production.