For example, the Forest Service was never sure whether its main purpose was to plant and harvest trees profitably or to provide jobs.
(the Forest Service; was never; sure whether its main purpose was to plant and harvest trees profitably or to provide jobs) (its main purpose; was; to plant and harvest trees profitably or to provide jobs)
the Forest Service its main purpose
was never was
sure whether its main purpose was to plant and harvest trees profitably or to provide jobs
to plant and harvest trees profitably or to provide jobs