( ( ( Think ( about ( ( ( normal childhood ) , ) behavior ) ) ) ( at ( ( this stage ) ( of life ) ) ) ) . )
(ROOT (S (VP (VB Think) (PP (IN about) (NP (NP (JJ normal) (NN childhood)) (, ,) (NP (NN behavior)))) (PP (IN at) (NP (NP (DT this) (NN stage)) (PP (IN of) (NP (NN life)))))) (. .)))
Think about normal childhood, behavior at this stage of life.
(ROOT (S (NP (NNP Childhood)) (VP (VBZ is) (ADJP (ADJP (RB typically) (JJR easier)) (PP (IN for) (S (VP (VBG learning) (NP (JJ multiple) (NNS languages))))))) (. .)))