( ( ( ( ( ( Cambrian ( ( The ( earliest period ) ) ( of ( the ( Paleozoic era ) ) ) ) ) , ) ( lasting ( from ( ( ( 570 to ) 505 ) Ma ) ) ) ) and ) ( preceding ( the ( Ordovician period ) ) ) ) . )
(ROOT (S (VP (VP (VBG Cambrian) (NP (NP (DT The) (JJS earliest) (NN period)) (PP (IN of) (NP (DT the) (JJ Paleozoic) (NN era))))) (, ,) (VP (VBG lasting) (PP (IN from) (NP (QP (CD 570) (TO to) (CD 505)) (NNS Ma)))) (CC and) (VP (VBG preceding) (NP (DT the) (NNP Ordovician) (NN period)))) (. .)))
Cambrian The earliest period of the Paleozoic era, lasting from 570 to 505 Ma and preceding the Ordovician period.
(ROOT (S (NP (NP (DT The) (JJ first) (NN period)) (PP (IN of) (NP (DT the) (JJ paleozoic) (NN era)))) (VP (VBD was) (VP (VBN called) (NP (NN cambrian)))) (. .)))