Western Virginia farmers needed nitrogen and phosphorus to fertilize their crops.
(Western Virginia farmers; needed; nitrogen and phosphorus; to fertilize their crops) Context(Western Virginia farmers needed,List([0, 31))):(Western Virginia farmers; needed nitrogen and phosphorus to fertilize; their crops)
Western Virginia farmers needed,List([0, 31))
Western Virginia farmers Western Virginia farmers
needed needed nitrogen and phosphorus to fertilize
nitrogen and phosphorus to fertilize their crops
their crops