( They ( all ( ( contain ( ( two substances ) ( called ( ( lutein and ) zeaxanthin ) ) ) ) . ) ) )
(ROOT (S (NP (PRP They)) (ADVP (DT all)) (VP (VBP contain) (NP (NP (CD two) (NNS substances)) (VP (VBN called) (NP (NN lutein) (CC and) (NN zeaxanthin))))) (. .)))
They all contain two substances called lutein and zeaxanthin.
(ROOT (S (NP (DT All) (NNS solutions)) (VP (VBP contain) (NP (QP (IN at) (JJS least) (CD two)) (NNS substances))) (. .)))