( migratory ( birds ( which ( ( fly ( from ( South America ) ) ) ( to ( ( ( winter ( in ( Arctic Circle ) ) ) , ) ( where they ) ) ) ) ) ) )
(ROOT (FRAG (ADVP (RB migratory)) (NP (NP (NNS birds)) (SBAR (WHNP (WDT which)) (S (VP (VBP fly) (PP (IN from) (NP (NNP South) (NNP America))) (S (VP (TO to) (VP (VB winter) (PP (IN in) (NP (NNP Arctic) (NNP Circle))) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (PRP they)))))))))))))
migratory birds which fly from South America to winter in Arctic Circle, where they
(ROOT (S (NP (NP (JJ Many) (NNS species)) (PP (IN of) (NP (NP (NNS birds)) (PP (IN in) (NP (JJ new) (NN england)))))) (VP (VBP fly) (ADVP (RB south) (PP (IN for) (NP (DT the) (NN winter) (NNS months)))) (S (VP (TO to) (VP (VB find) (NP (DT an) (NN environment)) (PP (IN with) (NP (JJR more) (NN food))))))) (. .)))