(S (S (S (BASENP (NNP Agca)) (VP (VBD shot) (BASENP (DT the) (NNP Pope)))) (SBAR (IN as) (S (BASENP (PRP he)) (VP (VP (VBD rode) (PP (IN around) (NP (BASENP (NNP St) (NNP Peter) (POS 's)) (NNP Square)))) (PP (IN in) (BASENP (DT a) (JJ open-topped) (NN car))))))) (PERIOD .))