(S (S (NP (NP (BASENP (DT A) (NN team)) (PP (IN of) (BASENP (NNS scientists)))) (PP (IN at) (BASENP (NNP Stanford) (NNP University)))) (VP (VBP claim) (S (VP (TO to) (VP (VB have) (VP (VBN detected) (NP (NP (DT a) (NP (ADJP (JJ subtle) (COMMA ,) (JJ missing)) (NN element))) (PP (IN of) (NP (BASENP (NNP Einstein) (POS 's)) (NP (BASENP (NN theory)) (PP (IN of) (BASENP (NN relativity))))))))))))) (PERIOD .))