Short leaves of 6 weeks or less (the norm in the United States) were linked to maternal anxiety and depression and negative interactions with babies.
( ( ( ( Short leaves ) ( of ( 6 ( weeks ( or less ) ) ) ) ) ( -LRB- ( ( ( the norm ) ( in ( the ( United States ) ) ) ) -RRB- ) ) ) ( ( were ( ( linked ( to ( maternal ( anxiety ( and ( depression ( and ( negative interactions ) ) ) ) ) ) ) ) ( with babies ) ) ) . ) )
(ROOT (S (NP (NP (NP (JJ Short) (NNS leaves)) (PP (IN of) (NP (CD 6) (NNS weeks) (QP (CC or) (JJR less))))) (PRN (-LRB- -LRB-) (NP (NP (DT the) (NN norm)) (PP (IN in) (NP (DT the) (NNP United) (NNPS States)))) (-RRB- -RRB-))) (VP (VBD were) (VP (VBN linked) (PP (TO to) (NP (JJ maternal) (NN anxiety) (CC and) (NN depression) (CC and) (JJ negative) (NNS interactions))) (PP (IN with) (NP (NNS babies))))) (. .)))
Long leaves of more than 6 weeks were shown to be beneficial for babies.
( ( ( Long leaves ) ( of ( ( more ( than 6 ) ) weeks ) ) ) ( ( were ( shown ( to ( be ( beneficial ( for babies ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Long) (NNS leaves)) (PP (IN of) (NP (QP (JJR more) (IN than) (CD 6)) (NNS weeks)))) (VP (VBD were) (VP (VBN shown) (S (VP (TO to) (VP (VB be) (ADJP (JJ beneficial) (PP (IN for) (NP (NNS babies))))))))) (. .)))