Nine months earlier (before the child could talk), the family had taken the same walk.
( ( ( Nine months ) earlier ) ( ( -LRB- ( ( before ( ( the child ) ( could talk ) ) ) -RRB- ) ) ( , ( ( the family ) ( ( had ( taken ( the ( same walk ) ) ) ) . ) ) ) ) )
(ROOT (S (ADVP (NP (CD Nine) (NNS months)) (RBR earlier)) (PRN (-LRB- -LRB-) (SBAR (IN before) (S (NP (DT the) (NN child)) (VP (MD could) (VP (VB talk))))) (-RRB- -RRB-)) (, ,) (NP (DT the) (NN family)) (VP (VBD had) (VP (VBN taken) (NP (DT the) (JJ same) (NN walk)))) (. .)))
The family had taken the same walk through the national park in September last year.
( ( The family ) ( ( had ( ( taken ( the ( same walk ) ) ) ( through ( ( ( the ( national park ) ) ( in September ) ) ( last year ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN family)) (VP (VBD had) (VP (VBN taken) (NP (DT the) (JJ same) (NN walk)) (PP (IN through) (NP (NP (DT the) (JJ national) (NN park)) (PP (IN in) (NP (NNP September))) (NP (JJ last) (NN year)))))) (. .)))