She responded by throwing down the block and turning to another activity.
( She ( ( responded ( by ( ( ( ( throwing down ) ( the block ) ) and ) ( turning ( to ( another activity ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD responded) (PP (IN by) (S (VP (VP (VBG throwing) (PRT (RP down)) (NP (DT the) (NN block))) (CC and) (VP (VBG turning) (PP (TO to) (NP (DT another) (NN activity)))))))) (. .)))
She responded by clutching at the block and not doing anything else.
( She ( ( responded ( by ( ( ( ( clutching ( at ( the block ) ) ) and ) not ) ( doing ( anything else ) ) ) ) ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD responded) (PP (IN by) (S (VP (VP (VBG clutching) (PP (IN at) (NP (DT the) (NN block)))) (CC and) (RB not) (VP (VBG doing) (NP (NN anything) (RB else))))))) (. .)))