( ( At ( convergent boundaries ) ) ( , ( plates ( ( move ( toward ( each ( ( other and ) collide ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (JJ convergent) (NNS boundaries))) (, ,) (NP (NNS plates)) (VP (VBP move) (PP (IN toward) (NP (DT each) (JJ other) (CC and) (JJ collide)))) (. .)))
At convergent boundaries, plates move toward each other and collide.
(ROOT (S (NP (DT A) (JJ convergent) (NN plate) (NN boundary)) (VP (VBZ is) (VP (VBN created) (SBAR (WHADVP (WRB when)) (S (NP (CD two) (NNS plates)) (VP (VBP come) (PP (IN toward) (NP (DT each) (JJ other)))))))) (. .)))