( It ( ( contains ( ( ( at least ) two ) species ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ contains) (NP (QP (IN at) (JJS least) (CD two)) (NNS species))) (. .)))
It contains at least two species.
(ROOT (S (NP (DT All) (NNS solutions)) (VP (VBP contain) (NP (QP (IN at) (JJS least) (CD two)) (NNS substances))) (. .)))