Infants tried all manner of signals'facial expressions, vocalizations, and body movements'to get their mother or father to respond again.
( Infants ( ( tried ( ( ( all manner ) ( of ( ( ( ( ( ( ( signals ` ) ( facial expressions ) ) , ) vocalizations ) , ) and ) ( body movements ) ) ) ) ( ` ( to ( ( get ( their ( ( mother or ) father ) ) ) ( to ( respond again ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Infants)) (VP (VBD tried) (S (NP (NP (DT all) (NN manner)) (PP (IN of) (NP (NP (NNS signals)) (`` `) (NP (JJ facial) (NNS expressions)) (, ,) (NP (NNS vocalizations)) (, ,) (CC and) (NP (NN body) (NNS movements))))) (`` `) (VP (TO to) (VP (VB get) (NP (PRP$ their) (NN mother) (CC or) (NN father)) (S (VP (TO to) (VP (VB respond) (ADVP (RB again))))))))) (. .)))
Infants also try to use gestures with their hands.
( Infants ( also ( ( try ( to ( ( use gestures ) ( with ( their hands ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Infants)) (ADVP (RB also)) (VP (VBP try) (S (VP (TO to) (VP (VB use) (NP (NNS gestures)) (PP (IN with) (NP (PRP$ their) (NNS hands))))))) (. .)))