( ( Scientists ( ( ( ( ( ( ( group volcanoes ) ( into ( four ( main kinds ) ) ) ) -- ) ( ( ( cinder cones ) , ) strato ) ) - ) or ) ( ( ( ( ( ( composite volcanoes ) , ) ( shield volcanoes ) ) , ) and ) ( lava domes ) ) ) ) . )
(ROOT (NP (NP (NNS Scientists)) (NP (NP (NP (NN group) (NNS volcanoes)) (PP (IN into) (NP (CD four) (JJ main) (NNS kinds)))) (: --) (NP (NP (NN cinder) (NNS cones)) (, ,) (NP (NN strato))) (: -) (CC or) (NP (NP (JJ composite) (NNS volcanoes)) (, ,) (NP (NN shield) (NNS volcanoes)) (, ,) (CC and) (NP (NN lava) (NNS domes)))) (. .)))
Scientists group volcanoes into four main kinds-- cinder cones , strato- or composite volcanoes, shield volcanoes , and lava domes .
(ROOT (S (NP (DT A) (NN crater)) (VP (MD can) (ADVP (RB usually)) (VP (VB be) (VP (VBN found) (PP (IN on) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (JJ composite) (NNS volcanoes)))))))) (. .)))