(NP (NP (BASENP (NNS Archaeologists)) (NP (NP (BASENP (NNP Timothy) (NNP Darvill)) (PP (IN of) (BASENP (NNP Bournemouth) (NNP University)))) (CC and) (NP (BASENP (NNP Geoff) (NNP Wainwright)) (COMMA ,) (NP (BASENP (NNP President)) (PP (IN of) (NP (BASENP (DT the) (NNP Society)) (PP (IN of) (BASENP (NNPS Antiquaries))))))))) (COMMA ,) (VP (VBD claimed) (S (VP (TO to) (VP (VB have) (VP (VBN found) (NP (NN evidence) (SBAR (IN that) (S (BASENP (NNP Stonehenge)) (VP (VP (VBD was) (ADVP (RB once))) (NP (BASENP (DT a) (NN center)) (PP (IN of) (BASENP (NN healing))))))))))))) (PERIOD .))