( ( ( Relate ( earthquake risk ) ) ( to ( plate boundaries ) ) ) . )
(ROOT (S (VP (VB Relate) (NP (NN earthquake) (NN risk)) (PP (TO to) (NP (NN plate) (NNS boundaries)))) (. .)))
Relate earthquake risk to plate boundaries.
(ROOT (S (NP (NP (DT The) (JJ vast) (NN majority)) (PP (IN of) (NP (NN earthquake)))) (VP (VBZ occurs) (PRT (RP along)) (NP (NP (CD one)) (PP (IN of) (NP (NP (CD three) (NNS types)) (PP (IN of) (NP (NN plate) (NNS boundaries))))))) (. .)))