sentences: most plants provide food for themselves by performing photosynthesis
docs: photosynthesis is process. digitaria is plant. general_photosynthesis is physiological_function. corn is plant_and_food. photosynthetic_plant is plant_kingdom. photosynthesis_in_plants is physiological_process. plants has leaves_to_gather_light general_photosynthesis is production. photosynthesis is process_by_which_leaf_makes_food. menyanthes is plant.