Vygotsky's theory has been the wellspring of our recent appreciation of the profoundly social nature of even very young children's imaginative play'and its wide-ranging infiuence on cognitive and social development.
( ( ( Vygotsky 's ) theory ) ( ( has ( been ( ( the wellspring ) ( of ( ( our ( recent appreciation ) ) ( of ( ( the ( ( profoundly social ) nature ) ) ( of ( ( ( ( even ( very young ) ) ( children 's ) ) ( imaginative play'and ) ) ( ( its ( wide-ranging infiuence ) ) ( on ( ( ( cognitive and ) social ) development ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Vygotsky) (POS 's)) (NN theory)) (VP (VBZ has) (VP (VBN been) (NP (NP (DT the) (NN wellspring)) (PP (IN of) (NP (NP (PRP$ our) (JJ recent) (NN appreciation)) (PP (IN of) (NP (NP (DT the) (ADJP (RB profoundly) (JJ social)) (NN nature)) (PP (IN of) (NP (NP (NP (ADJP (RB even) (RB very) (JJ young)) (NNS children) (POS 's)) (JJ imaginative) (NN play'and)) (NP (NP (PRP$ its) (JJ wide-ranging) (NN infiuence)) (PP (IN on) (NP (ADJP (JJ cognitive) (CC and) (JJ social)) (NN development))))))))))))) (. .)))
Vygotsky's theory has been affirmed a number of times in our observations.
( ( ( Vygotsky 's ) theory ) ( ( has ( been ( affirmed ( ( a number ) ( of ( times ( in ( our observations ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Vygotsky) (POS 's)) (NN theory)) (VP (VBZ has) (VP (VBN been) (VP (VBN affirmed) (NP (NP (DT a) (NN number)) (PP (IN of) (NP (NP (NNS times)) (PP (IN in) (NP (PRP$ our) (NNS observations))))))))) (. .)))