( This ( ( places ( ( the ( south ( magnetic pole ) ) ) ( in Antarctica ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ places) (NP (NP (DT the) (JJ south) (JJ magnetic) (NN pole)) (PP (IN in) (NP (NNP Antarctica))))) (. .)))
This places the south magnetic pole in Antarctica.
(ROOT (S (NP (NP (DT The) (NN earth) (POS 's)) (JJ magnetic) (NNS poles)) (VP (VBP have) (VP (VBN switched) (NP (NNS places)) (ADVP (RB repeatedly)) (PP (IN in) (NP (DT the) (NN past))))) (. .)))