( ( ( The instructions ) ( for ( how ( to ( assemble proteins ) ) ) ) ) ( ( ( are usually ) ( contained ( within ( DNA molecules ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS instructions)) (PP (IN for) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB assemble) (NP (NNS proteins)))))))) (VP (VBP are) (ADVP (RB usually)) (VP (VBN contained) (PP (IN within) (NP (NN DNA) (NNS molecules))))) (. .)))
The instructions for how to assemble proteins are usually contained within DNA molecules.
(ROOT (S (NP (NNP Dna)) (VP (VBZ encodes) (NP (NP (NNS instructions)) (PP (IN for) (NP (NNS proteins) (NNS molecules))))) (. .)))