(S (S (BASENP (NNP Sunni) (NNP Arab) (NNP Gulf) (NNS states)) (VP (VBP have) (VP (VP (VBN maintained) (NP (BASENP (NNS relations)) (PP (IN with) (BASENP (NNP Iran))))) (PP (IN despite) (NP (BASENP (PRPD their) (NNS concerns)) (PP (IN about) (NP (BASENP (DT the) (JJ Shi'ite) (NN country) (POS 's)) (BASENP (JJ regional) (NN influence))))))))) (PERIOD .))