(S (S (BASENP (NNS Talks)) (VP (VBP have) (VP (VBN been) (VP (VBN stalled) (PP (JJ due) (PP (TO to) (NP (NP (BASENP (NNS disagreements)) (PP (IN between) (NP (DT the) (NP (BASENP (NNP European) (NNP Union)) (CC and) (BASENP (NNP United) (NNPS States)))))) (PP (IN over) (NP (BASENP (NNS subsidies) (CC and) (NNS tariffs)) (PP (IN for) (BASENP (DT the) (JJ agricultural) (NN sector)))))))))))) (PERIOD .))