( ( The researchers ) ( ( ( gathered information ) ( on ( how ( ( the subjects ) ( ( ( spent ( their ( leisure time ) ) ) ( during ( ( ( their ( early adulthood ) ) , ) ( age 20 ) ) ) ) ( ( ( ( to 39 ) , ) and ) ( during ( ( ( their ( middle adulthood ) ) , ) ( age ( ( 40 to ) 60 ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS researchers)) (VP (VBD gathered) (NP (NN information)) (PP (IN on) (SBAR (WHADVP (WRB how)) (S (NP (DT the) (NNS subjects)) (VP (VBD spent) (NP (PRP$ their) (NN leisure) (NN time)) (PP (IN during) (NP (NP (PRP$ their) (JJ early) (NN adulthood)) (, ,) (NP (NN age) (CD 20)))) (PP (PP (TO to) (NP (CD 39))) (, ,) (CC and) (PP (IN during) (NP (NP (PRP$ their) (JJ middle) (NN adulthood)) (, ,) (NP (NP (NN age)) (NP (QP (CD 40) (TO to) (CD 60)))))))))))) (. .)))
The researchers gathered information on how the subjects spent their leisure time during their early adulthood, age 20 to 39, and during their middle adulthood, age 40 to 60.
(ROOT (S (NP (NNP Menopause)) (VP (VBZ occurs) (PRT (RP in)) (PP (IN in) (NP (JJ middle) (NN adulthood)))) (. .)))