( ( ( Natural ( and ( informal interactions ) ) ) ( with peers ) ) ( ( are important ) . ) )
(ROOT (S (NP (NP (JJ Natural) (CC and) (JJ informal) (NNS interactions)) (PP (IN with) (NP (NNS peers)))) (VP (VBP are) (ADJP (JJ important))) (. .)))
Natural and informal interactions with peers are important.
(ROOT (S (NP (NNP Community) (NNS interactions)) (VP (VBP are) (NP (NP (JJ important) (NNS factors)) (PP (IN in) (NP (JJ natural) (NN selection))))) (. .)))