( ( Yet ( ( ( the gravity ) ( on ( the asteroid ) ) ) ( seems ( ( strong enough ) ( to ( ( make ( boulders roll ) ) downhill ) ) ) ) ) ) ( , ( ( NEAR scientists ) ( said . ) ) ) )
(ROOT (S (S (CC Yet) (NP (NP (DT the) (NN gravity)) (PP (IN on) (NP (DT the) (NN asteroid)))) (VP (VBZ seems) (ADJP (JJ strong) (RB enough) (S (VP (TO to) (VP (VB make) (NP (JJ boulders) (NN roll)) (ADVP (RB downhill)))))))) (, ,) (NP (JJ NEAR) (NNS scientists)) (VP (VBD said)) (. .)))
Yet the gravity on the asteroid seems strong enough to make boulders roll downhill, NEAR scientists said.
(ROOT (S (NP (NNP Gravity)) (VP (VBZ causes) (S (NP (NNS rocks)) (VP (TO to) (VP (VB roll) (ADVP (RB downhill)))))) (. .)))