(S (S (NP (NP (QP (ADVP (IN At) (JJS least)) (NN two)) (BASENP (JJ Afghan) (NN security) (NNS guards))) (CC and) (BASENP (DT a) (NN civilian))) (VP (VBD died) (PP (IN in) (BASENP (DT the) (NN assault))))) (PERIOD .))