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