(S (S (BASENP (EX There)) (VP (VBP are) (NP (BASENP (JJ unconfirmed) (NNS reports)) (SBAR (IN that) (S (BASENP (DT a) (JJ second) (NN officer)) (VP (VBZ has) (VP (ADVP (RB also)) (VP (VBN been) (VP (VBN injured)))))))))) (PERIOD .))