skillfully assembled , highly polished and 
(ROOT (S (ADVP (RB skillfully)) (VP (VP (VBN assembled)) (, ,) (ADJP (RB highly) (JJ polished)) (CC and))))
(ROOT (S (ADVP (RB )) (VP (VP (VBN )) (, ) (ADJP (RB ) (JJ )) (CC ))))