(S (S (BASENP (PRP It)) (VP (VBD was) (VP (VBN located) (PP (IN within) (NP (BASENP (NN one) (NN block)) (PP (IN of) (NP (BASENP (DT the) (NN exposition) (POS 's)) (BASENP (JJ main) (NN entrance))))))))) (PERIOD .))