( ( expertise ( in ( ( ( ( ( ( ( infancy , ) ( early childhood ) ) , ) ( child development ) ) , ) or ) parenting ) ) ) ; )
(ROOT (NP (NP (NN expertise)) (PP (IN in) (NP (NP (NN infancy)) (, ,) (NP (JJ early) (NN childhood)) (, ,) (NP (NN child) (NN development)) (, ,) (CC or) (NP (NN parenting)))) (: ;)))
expertise in infancy, early childhood, child development, or parenting;
(ROOT (S (NP (DT An) (NN individual)) (VP (VP (VBZ grows) (ADVP (RB quickly))) (CC and) (VP (VBZ develops) (NP (JJ new) (NNS abilities)) (PP (IN during) (NP (PRP$ their) (NN infancy) (CC and) (NN childhood))))) (. .)))
An individual grows quickly and develops new abilities during their infancy and childhood.