(S (S (BASENP (NNP Poison)) (VP (VBP claim) (SBAR (S (BASENP (DT the) (NN two) (NNS companies)) (VP (VBP have) (VP (VP (VP (VBN underpaid) (BASENP (PRP them))) (NNS royalties)) (PP (IN for) (BASENP (NNS years))))))))) (PERIOD .))