For the last 60 years America has sought to prevent the erosion of topsoil from wind and water, and through concerted action we have for the most part succeeded.
(we; have succeeded; ) (America; has sought; to prevent the erosion of topsoil from wind and water; T:For the last 60 years) Context(America has sought,List([22, 40))):(America; has sought to prevent; the erosion of topsoil from wind and water)
America has sought,List([22, 40))
we America America
have succeeded has sought has sought to prevent
to prevent the erosion of topsoil from wind and water T:For the last 60 years
the erosion of topsoil from wind and water