(S (S (BASENP (DT The) (NNS leaders)) (VP (VBP are) (VP (VBN expected) (S (VP (TO to) (VP (VP (VB take) (NP (BASENP (DT a) (NN pilgrimage)) (PP (TO to) (NP (NP (BASENP (DT the) (NNP Grand) (NNP Mosque)) (PP (IN in) (BASENP (NNP Mecca)))) (COMMA ,) (NP (BASENP (NNP Islam) (POS 's)) (BASENP (JJS holiest) (NN site))))))) (COMMA ,) (PP (IN before) (S (VP (VBG opening) (NP (BASENP (NNS talks)) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (VP (VBN expected) (S (VP (TO to) (VP (VB continue) (PP (IN on) (BASENP (NNP Wednesday)))))))))))))))))))) (PERIOD .))