(S (S (NP (BASENP (NNS Thousands)) (PP (IN of) (BASENP (NNS protestors)))) (VP (VP (VBD demonstrated) (BASENP (NN today))) (PP (IN in) (NP (BASENP (NNP Baku)) (COMMA ,) (NP (BASENP (DT the) (NN capital)) (PP (IN of) (BASENP (NNP Azerbaijan)))))))) (PERIOD .))