Over their lives, trees can be much less expensive than air conditioners and the energy needed to run them.
(trees; can be; much less expensive than air conditioners and the energy needed to run them; T:Over their lives) (the energy; needed; to run them) Context(the energy needed,List([77, 94))):(the energy; needed to run; them)
the energy needed,List([77, 94))
trees the energy the energy
can be needed needed to run
much less expensive than air conditioners and the energy needed to run them T:Over their lives
to run them
them