He inspired more research on children's thinking than any other single theorist.
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(ROOT (S (NP (PRP He)) (VP (VBD inspired) (NP (JJR more) (NN research)) (PP (IN on) (NP (NP (NNS children) (POS 's)) (NN thinking))) (PP (IN than) (NP (DT any) (JJ other) (JJ single) (NN theorist)))) (. .)))
He led the charge in research on the psychology of the elderly, and contributed more than any other single theorist.
( He ( ( ( ( ( ( ( led ( the charge ) ) ( in research ) ) ( on ( ( the psychology ) ( of ( the elderly ) ) ) ) ) , ) and ) ( ( contributed more ) ( than ( any ( other ( single theorist ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VP (VBD led) (NP (DT the) (NN charge)) (PP (IN in) (NP (NN research))) (PP (IN on) (NP (NP (DT the) (NN psychology)) (PP (IN of) (NP (DT the) (JJ elderly)))))) (, ,) (CC and) (VP (VBD contributed) (ADVP (RBR more)) (PP (IN than) (NP (DT any) (JJ other) (JJ single) (NN theorist))))) (. .)))