, are crisp and purposeful without overdoing it 
(ROOT (S (, ,) (VP (VBP are) (ADJP (JJ crisp) (CC and) (JJ purposeful)) (PP (IN without) (S (VP (VBG overdoing) (NP (PRP it))))))))
(ROOT (S (, ) (VP (VBP ) (ADJP (JJ ) (CC ) (JJ )) (PP (IN ) (S (VP (VBG ) (NP (PRP ))))))))