improved upon the first and taken it a step further , richer and deeper 
(ROOT (S (VP (VP (VBN improved) (PP (IN upon) (NP (DT the) (JJ first)))) (CC and) (VP (VBD taken) (NP (PRP it)) (ADVP (ADVP (NP (DT a) (NN step)) (RBR further)) (, ,) (ADJP (JJR richer) (CC and) (JJR deeper)))))))
(ROOT (S (VP (VP (VBN ) (PP (IN ) (NP (DT ) (JJ )))) (CC ) (VP (VBD ) (NP (PRP )) (ADVP (ADVP (NP (DT ) (NN )) (RBR )) (, ) (ADJP (JJR ) (CC ) (JJR )))))))