(S (S (BASENP (DT A) (NN blast)) (VP (VBD was) (VP (VBN reported) (PP (IN at) (NP (BASENP (DT a) (NN police) (NN box)) (PP (IN in) (NP (BASENP (NNP Nonthaburi) (NNP Province)) (PP (IN on) (NP (BASENP (DT the) (JJ northern) (NNS outskirts)) (PP (IN of) (BASENP (NNP Bangkok)))))))))))) (PERIOD .))