(S (S (BASENP (NNS Physicists)) (VP (VBP hope) (SBAR (IN that) (S (BASENP (NNP ILC)) (VP (MD might) (VP (VB be) (ADJP (JJ able) (S (VP (TO to) (VP (VB resolve) (NP (BASENP (DT some)) (PP (IN of) (NP (BASENP (DT the) (NNS questions)) (VP (VBN raised) (PP (IN by) (NP (BASENP (NNP Einstein) (POS 's)) (NP (BASENP (NNS theories)) (PP (IN of) (BASENP (NN relativity)))))))))))))))))))) (PERIOD .))