( ( ( Many systems ) ( containing ( active components ) ) ) ( ( are ( designed ( as ( ( at least ) ( a ( two-train system ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Many) (NNS systems)) (VP (VBG containing) (NP (JJ active) (NNS components)))) (VP (VBP are) (VP (VBN designed) (PP (IN as) (NP (ADVP (IN at) (JJS least)) (DT a) (JJ two-train) (NN system))))) (. .)))
Many systems containing active components are designed as at least a two-train system.
(ROOT (S (NP (DT All) (NNS solutions)) (VP (VBP contain) (NP (QP (IN at) (JJS least) (CD two)) (NNS substances))) (. .)))