relegated to the background -- a welcome step 
(ROOT (S (S (VP (VBN relegated) (PP (IN to) (NP (DT the) (NN background))))) (, --) (NP (DT a) (JJ welcome) (NN step))))
(ROOT (S (S (VP (VBN ) (PP (IN ) (NP (DT ) (NN ))))) (, ) (NP (DT ) (JJ ) (NN ))))