(S (S (BASENP (NNP Frelimo)) (VP (VBZ has) (VP (VP (VBN been) (PP (IN in) (BASENP (NN power)))) (PP (IN since) (NP (BASENP (NN 1975)) (COMMA ,) (SBAR (WHADVP (WRB when)) (S (BASENP (NNP Mozambique)) (VP (VBD declared) (NP (BASENP (NN independence)) (PP (IN from) (BASENP (NNP Portugal)))))))))))) (PERIOD .))