sentences: a plant requires photosynthesis to grow
docs: photosynthesis is process. gardening is necessary_activity_to_grow_tomatoes. photosynthesis_in_plants is general_photosynthesis. photosynthesis is photo_chemical_process. general_photosynthesis is biological_energy_transfer. photosynthesis_in_plants is physiological_process. photosynthesis is chemical_process. plants has leaves_to_gather_light general_photosynthesis is production. photosynthesis is process_by_which_leaf_makes_food.