( ( ( Background Information ) ( A ( compound machine ) ) ) ( ( is ( ( a combination ) ( of ( ( ( two or ) more ) ( simple machines ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Background) (NNP Information)) (NP (DT A) (JJ compound) (NN machine))) (VP (VBZ is) (NP (NP (DT a) (NN combination)) (PP (IN of) (NP (QP (CD two) (CC or) (JJR more)) (JJ simple) (NNS machines))))) (. .)))
Background Information A compound machine is a combination of two or more simple machines.
(ROOT (S (NP (NNS Scissors)) (VP (VBP are) (NP (JJ compound) (NNS machines))) (. .)))