(S (S (BASENP (DT The) (NN blast)) (VP (VBD targeted) (NP (BASENP (DT a) (NN university) (NN graduation) (NN ceremony)) (VP (VBG being) (VP (VBN attended) (PP (IN by) (NP (BASENP (DT a) (NN number)) (PP (IN of) (BASENP (NN government) (NNS officials)))))))))) (PERIOD .))