(S (S (S (BASENP (DT The) (JJ first) (NN trial)) (VP (VBD ended) (PP (IN in) (BASENP (DT a) (NN mistrial))))) (SBAR (IN after) (S (BASENP (NN one) (NN juror)) (VP (VBD received) (BASENP (DT a) (JJ threatening) (NN letter)))))) (PERIOD .))