( Machine ( type -- ) )
(ROOT (NP (NN Machine) (NN type) (: --)))
Machine type --
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types) (NNS types)) (PP (IN of) (NP (JJ simple) (NNS machines))))) (. .)))