(S (S (S (BASENP (DT A) (NNP NATO) (NN airstrike)) (VP (VBZ has) (VP (VP (VP (VBN killed) (NP (NP (QP (ADVP (IN at) (JJS least)) (NN seven)) (NNS members)) (PP (IN of) (BASENP (DT the) (JJ Afghan) (NN security) (NNS forces))))) (PP (IN in) (NP (BASENP (DT the) (JJ western) (NN province)) (PP (IN of) (BASENP (NNP Badghis)))))) (PP (IN on) (BASENP (NNP Friday)))))) (COMMA ,) (PP (VBG according) (PP (TO to) (BASENP (DT the) (JJ Afghan) (NN defense) (NN ministry))))) (PERIOD .))