( ( Paleozoic ( Era ( 570 ( Cambrian Period ) ) ) ) ( ( ( 570 ( ( Abundant ( fossil evidence ) ) ( of ( invertebrate life ) ) ) ) ( throughout ( the world ) ) ) . ) )
(ROOT (S (NP (JJ Paleozoic) (NNP Era) (NNP 570) (NNP Cambrian) (NNP Period)) (VP (VBD 570) (NP (NP (JJ Abundant) (JJ fossil) (NN evidence)) (PP (IN of) (NP (JJ invertebrate) (NN life)))) (PP (IN throughout) (NP (DT the) (NN world)))) (. .)))
Paleozoic Era 570 Cambrian Period 570 Abundant fossil evidence of invertebrate life throughout the world.
(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)))) (. .)))