(S (S (BASENP (JJ Early) (NNS reports)) (VP (VBP indicate) (SBAR (IN that) (S (BASENP (DT both) (NNS men)) (VP (VP (VBD sustained) (BASENP (NN head) (NNS injuries))) (PP (IN in) (BASENP (DT the) (NN blast)))))))) (PERIOD .))