(S (S (BASENP (DT The) (NNP National) (NNP Weather) (NNP Service)) (VP (VP (VBD confirmed) (BASENP (NNP Saturday) (NN morning))) (SBAR (IN that) (S (BASENP (PRP it)) (VP (VP (VBD was) (BASENP (DT a) (NN tornado))) (SBAR (WHNP (WDT that)) (S (VP (VBD struck) (BASENP (DT the) (NN city)))))))))) (PERIOD .))