(S (S (BASENP (DT The) (JJ three-hour) (NN session)) (VP (VBD was) (VP (VBN held) (PP (IN in) (NP (BASENP (DT the) (NNP Queen) (NNP Elizabeth) (NNP II) (NNP Conference) (NNP Centre)) (PP (IN in) (NP (BASENP (NNP London) (POS 's)) (NP (BASENP (NNP City)) (PP (IN of) (BASENP (NNP Westminster))))))))))) (PERIOD .))