(S (S (BASENP (PRP It)) (VP (VP (VBZ is) (ADJP (JJ unclear))) (SBAR (IN if) (S (BASENP (DT the) (NN two) (NNS robberies)) (VP (VP (VBP are) (VP (VBD connected))) (CC or) (VP (RB not))))))) (PERIOD .))