( ( ( ( ( Each ( of ( these ( three ( major stages ) ) ) ) ) , ) ( which ( we ( will classify ) ) ) ) , ) ( also ( ( ( ( ( had changes ) within ) so ) ( that ( ( the researcher ) ( could ( ( divide ( each ( of ( these stages ) ) ) ) ( into ( many ( more stages ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT Each)) (PP (IN of) (NP (DT these) (CD three) (JJ major) (NNS stages))) (, ,) (SBAR (WHNP (WDT which)) (S (NP (PRP we)) (VP (MD will) (VP (VB classify))))) (, ,)) (ADVP (RB also)) (VP (VBD had) (NP (NNS changes)) (PP (IN within)) (ADVP (RB so)) (SBAR (IN that) (S (NP (DT the) (NN researcher)) (VP (MD could) (VP (VB divide) (NP (NP (DT each)) (PP (IN of) (NP (DT these) (NNS stages)))) (PP (IN into) (NP (JJ many) (JJR more) (NNS stages)))))))) (. .)))
Each of these three major stages, which we will classify, also had changes within so that the researcher could divide each of these stages into many more stages.
(ROOT (S (NP (NNP Adulthood)) (VP (VBZ is) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS stages))))) (. .)))